Tuesday, April 08, 2025

 

The Lancet: Nearly 500,000 children could die from AIDS-related causes by 2030 without stable PEPFAR programmes, expert policy analysis estimates



The Lancet






The Lancet: Nearly 500,000 children could die from AIDS-related causes by 2030 without stable PEPFAR programmes, expert policy analysis estimates  

  • Experts assessed the potential impacts on HIV/AIDS treatment and prevention efforts in sub-Saharan Africa if the US President’s Emergency Plan for AIDS Relief (PEPFAR) is suspended or only receives limited, short-term funding, estimating that 1 million additional children could become infected with HIV and nearly 500,000 children could die from AIDS by 2030.
  • The authors also estimate that as many as 2.8 million children could become orphaned in the next five years if PEPFAR programmes are reduced or eliminated.
  • The analysis included an overview of PEPFAR programme benefits, including its success in increasing two-way trade between the USA and countries in Africa, improving diplomatic relations, and strengthening health systems and other programmes to support child health and prevent sexual violence against girls. 
  • The authors call for a strategic, five-year transition plan for PEPFAR programmes to avoid preventable new paediatric HIV infections, deaths, and HIV-related orphanhood and to preserve the USA’s position as a leader in global health diplomacy. 
  • An accompanying Correspondence letter from 11 senior health officials in Africa details commitments from national governments to transition to long-term, sustainable country ownership of HIV programmes in partnership with the USA.

In the face of ongoing funding disruptions to US foreign assistance programmes, a group of international experts calls for urgent action to ensure the continuation of life-saving interventions and support for children and families affected by HIV/AIDS in sub-Saharan Africa. The new Health Policy analysis, published in The Lancet, estimates that 1 million children could become infected with HIV, nearly half a million could die from AIDS by 2030, and 2.8 million children could experience orphanhood in the region without consistent, stable funding for US President’s Emergency Plan for AIDS Relief (PEPFAR) programmes.  

 

The authors say their analysis presents strong evidence that funding PEPFAR programmes for at least five more years is critically important to prevent unnecessary paediatric illness, death, and orphanhood, maintain current progress in efforts to prevent new HIV infections worldwide, and uphold the USA’s position as a leader in global health diplomacy.  

 

PEPFAR, established by the United States Government in 2003, has been a cornerstone in addressing the global HIV/AIDS epidemic, providing over $120 billion in funding to treat and prevent HIV/AIDS. The programme is estimated to have saved more than 26 million lives and ensured 7.8 million babies were born HIV-free. It currently supports over 20 million people with HIV prevention and treatment services, primarily in sub-Saharan Africa [1]. However, continued funding of PEPFAR programmes remains uncertain, raising concerns about the future of HIV/AIDS prevention and treatment efforts, particularly in light of US President Trump’s executive order [2] pausing all foreign aid for 90 days pending a review. Despite PEPFAR receiving a limited waiver to continue some programmes, many of PEPFAR’s services have been disrupted or suspended since 20 January 2025. [3] 

 

“The future of PEPFAR programmes hang in the balance. Losing stable, long-term support for PEPFAR programmes sets global progress to end HIV/AIDS back to the dark ages of the epidemic, especially for children and adolescents,” said co-lead author Prof Lucie Cluver of the University of Oxford (UK).“A sudden withdrawal of PEPFAR programmes, especially in the absence of a long term strategy to replace them, could lead to a resurgence of HIV infections and preventable deaths, and a dramatic rise in the number of children orphaned by AIDS in the coming years – a setback that could erode two decades of progress.”  

 

Cluver adds, “Continued investments in PEPFAR programmes combined with progressive growth in African co-financing can create a sustainable transition for country-led ownership of HIV programmes and preserve the legacy of PEPFAR’s lifesaving work.” 

 

The authors conducted an original modelled analysis using existing data [4] to predict the risks children in sub-Saharan Africa would face in the absence of PEPFAR programmes, including increased HIV infections, AIDS-related deaths, and orphanhood. The estimates suggest that by 2030, there could be 1 million new cases of paediatric HIV and 460,000 additional AIDS-related deaths in children. Furthermore, if there is a complete cessation of PEPFAR, it could substantially reduce adult life expectancies, and leaving 2.8 million additional children orphaned. 

 

“We are already seeing the devastating impacts of the USA’s recent foreign aid freezes,” said co-author Susan Hillis, Imperial College, London (UK). “By eliminating many programmes PEPFAR supports for children beyond HIV treatment and prevention, such as programmes that prevent sexual violence and support general child health and wellbeing, many of the children and adolescents who currently benefit from PEPFAR programmes will slip through the cracks -- increasing their chances of acquiring HIV or leading to further transmission, ultimately resulting in many preventable HIV infections and deaths.” 

 

The authors also highlight how PEPFAR programmes have demonstrated long-term sustainability by reducing children's lifetime risk of acquiring HIV. Prior to the widespread availability of antiretrovirals in Africa, more than 20 million people died from AIDS-related causes in the region, leaving behind millions of orphaned children. PEPFAR's efforts have significantly contributed to decreasing the number of AIDS orphans from its peak of over 14 million children in 2010 to 10.5 million by 2023 [5]. 

 

In addition to modelling the immediate effects of PEPFAR funding disruptions, the authors assessed PEPFAR’s impact beyond HIV/AIDS, highlighting the international diplomacy, economic benefits – including a four-fold increase in two-way trade between the USA and countries in Africa, educational improvements, and healthcare advancements, as well as various initiatives to combat violence against girls and protect vulnerable children.  

 

“Renewing PEPFAR investments safeguards the health and well-being of millions of people and reinforces the USA's position as a global leader in foreign assistance and health diplomacy. Programmes like PEPFAR have successfully elevated public opinion of the USA and enabled bilateral cooperation not only with countries receiving PEPFAR support, but also globally, which in turn contributes to protecting national security, strengthening trade, and advancing strategic diplomacy. Ending PEPFAR would create a void likely filled by other countries, with reports indicating China and Iran are poised to assume global health leadership roles, enabling them to increase their influence in the region,” said co-lead author Gibstar Makangila, Executive Director of Circle of Hope (Zambia).  

 

The authors also offer insights into how to build more sustainable PEPFAR programmes into 2030 and beyond, citing ongoing efforts to unite both international and local partners to close funding gaps, increase country- and community-led initiatives, and support improvements to domestic healthcare systems. PEPFAR-supported countries in Africa have already demonstrated commitments to ownership of HIV responses by 2030 with progressive increases in co-financing health systems from $13·1 billion per year in 2004 to $40·7 billion per year in 2021.[6] 

 

“Our analysis not only highlights the immediate health implications of inadequate funding but also emphasises the broader socio-economic benefits of PEPFAR investments and offers a glimpse into the future of PEPFAR programmes, where long-term strategies that build local capacity to improve health and wellbeing for all is vital for global health security, especially as it's projected that in the next 25 years, half of all children and adolescents worldwide will live in Africa”, said co-author Joel-Pascal Ntwali--N’Konzi of the University of Oxford (UK).  

 

Co-author Prof Chris Desmond, of the University of Kwazulu-Natal (South Africa) added, “What is urgently needed now is a well-planned transition to expanded country-ownership of PEPFAR programmes that will take this lifesaving work forward and offer stability and sustainability for countries that currently rely on PEPFAR support now and into the future, which in turn also benefits the USA and solidifies its position as a global leader in the effort to end HIV.”  

 

The authors note some important limitations of this analysis, including that the international funding landscape is rapidly changing and the future of PEPFAR programmes are unknown. Additionally, this analysis used the best available data on HIV infections and death rates to develop future estimates.  

 

In a related Correspondence, also published in The Lancet, 11 senior health officials from African countries wrote “Together, we are confident that we can achieve the goal of ending the HIV and AIDS pandemic as a global threat for our children and families, as our African nations collaborate with the USA and other international donors to continue transitioning towards strengthening and increasing domestic investments for health, and for HIV as a key priority within such investments. Together, we can end this fight and finish well, making not just the USA and Africa, but indeed the world, safer, stronger, and more prosperous.” 

 

NOTES TO EDITORS 

A full list of authors and their institutions is available in the paper.  

 

The labels have been added to this press release as part of a project run by the Academy of Medical Sciences seeking to improve the communication of evidence. For more information, please see: http://www.sciencemediacentre.org/wp-content/uploads/2018/01/AMS-press-release-labelling-system-GUIDANCE.pdf if you have any questions or feedback, please contact The Lancet press office pressoffice@lancet.com  

 

Quotes from Authors cannot be found in the text of the policy review, but have been supplied for the press release.  

 

[1] https://www.state.gov/results-and-impact-pepfar 

[2] https://www.whitehouse.gov/presidential-actions/2025/01/reevaluating-and-realigning-united-states-foreign-aid/ 

[3] https://www.kff.org/policy-watch/the-outlook-for-pepfar-in-2025-and-beyond/#:~:text=Despite%20PEPFAR%20receiving%20a%20limited,growing%20headwinds%20in%20recent%20years

[4] Publicly available data was used from Spectrum https://www.avenirhealth.org/software-spectrum.php 

and World Population Prospects https://population.un.org/dataportal/home?df=995137c4-40d6-445f-8090-7db38eee279d  

[5] https://www.afro.who.int/health-topics/hivaids 

[6] amfAR issue brief: Domestic Funding Contributions to Health: Comparing Changes in Domestic Financing in PEPFAR and Non-PEPFAR Supported Countries (March 2025): https://www.amfar.org/wp-content/uploads/2025/04/IB-World-Bank-Country-Analysis.pdf 

 

 

Eclipse echoes: groundbreaking study reveals surprising avian vocal patterns during solar eclipse



Published in Scientific Reports, Haikubox community science study finds significant bird song decline only where more than 99% solar obscuration occurred



Orca Communications

Solar Eclipse at partial obscuration 

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Solar Eclipse at partial obscuration

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Credit: Amy Donner of Haikubox




A new study published today in Scientific Reports reveals how birds responded to the April 8, 2024, total solar eclipse across North America. The study finds bird vocalizations significantly declined only where more than 99% solar obscuration occurred. Researchers from Loggerhead Instruments, Inc. and the K. Lisa Yang Center for Conservation Bioacoustics at the Cornell Lab of Ornithology analyzed data from 344 community-based acoustic monitoring devices, called Haikuboxes, using a novel neural network approach. Unlike previous studies, this research controlled for human presence, recognizing that birds might react to the observers themselves, rather than the eclipse. This is the first major study to leverage the Haikubox network for scientific research. 

“Anecdotal evidence has long suggested that birds fall silent or exhibit nighttime behaviors during a total solar eclipse,” said David Mann, PhD., lead author of the study and researcher at Loggerhead Instruments. “Our study shows that on average, birds do get quiet during and just after totality, but we also learned that this behavior is strongly linked to the degree of darkness experienced."

The research also revealed varied responses among different bird species, even for the same species at different locations. For example, Black-capped Chickadees at two sites reacted differently to the eclipse: at one site in New York State they were quiet until well after totality, while they increased their vocalizations during and immediately after peak totality at another site in Vermont. Other species and site variations were found: for example, one or more American Robins sang throughout totality at one site in Kentucky, while Pine Siskin vocalizations stopped completely during totality at another site in Maine.

“The variability in bird responses and site differences was fascinating,” said Mann. “We really don’t know why birds had such different responses to the total darkness during the eclipse. Despite examining factors like temperature, cloud cover, and wind speed, we found no significant relationship with changes in vocalization rates. This strongly suggests that the sudden total darkness and associated changes in wind and temperature were the primary drivers of the observed behavioral shifts.” 

It is important to note that data from Haikuboxes with detectable human presence during the eclipse period were excluded to eliminate potential reactions to human presence. “Our first, quick look at Haikubox data just a few hours after the eclipse showed a large dip in bird vocalizations around the time of peak totality,” said Mann. “When we dove deeper into the data and removed any sites where humans may have influenced the birds’ behaviors, we found a much more complicated story. People were pretty excited about the total solar eclipse, and their celebrations likely affected the birds’ reactions.”

This study shows the research potential of a large, community science-powered, bioacoustic monitoring network. “In a time when technology often pulls us away from the natural world, Haikubox does the opposite – it fosters a deeper connection to it. By combining AI technology with a love for the environment, Haikubox helps people engage with nature in a modern and educational way,” notes Mann. The Haikubox network relies on community scientists (also sometimes referred to as citizen scientists) to host acoustic monitoring devices. It provides a unique platform for studying wildlife behavior across broad geographic areas without the biases associated with human observation.

“Our findings can inform future research on the impacts of light pollution and sudden changes in light levels on bird behavior, " notes Mann. “Furthermore, it proves that when we combine the power of community science with clever technology, we can learn amazing things about wildlife without disturbing them, which may inform future continental-scale studies."  As one node in a growing passive acoustic monitoring network, Haikubox owners contribute valuable bird behavior data that can fuel future scientific research. 

The study, published April 8, 2025, is titled “Continental-scale behavioral response of birds to a total solar eclipse.” In addition to Mann, it is co-authored by Austin Anderson, Amy Donner and Michael Hall of Haukubox; and Stefan Kahl and Holger Klinck of the K. Lisa Yang Center for Conservation Bioacoustics at the Cornell Lab of Ornithology. Haikubox was developed with support from the National Science Foundation (NSF)’s Small Business Innovation Research (SBIR) program.

The research team expects this is the first of many research projects to use Haikubox acoustic data. “Passive acoustic monitoring is a terrific tool for gathering data about animal behavior, and regular folks play an important role in widening our listening network,” said Mann. “Putting a Haikubox in your yard helps us add to the already 1 billion acoustic recordings we’ve gathered. Our community is enabling tomorrow’s scientific discoveries.”


 

About Haikubox

Haikubox is an  AI-Enabled Wi-Fi-connected device that helps birdwatchers “bird by ear” by automatically identifying birds through their unique sounds, while also contributing valuable data to a community science network for ecological research. By fostering a deeper connection with nature through technology, Haikubox empowers users to effortlessly observe and record the beauty and seasonality of birds in their environment.  

 

About Loggerhead Instruments, Inc:

Loggerhead Instruments, Inc. designs and manufactures environmental monitoring instruments and provides advanced technology solutions for ecological research.

 

About the Cornell Lab of Ornithology:

The Cornell Lab of Ornithology is a world leader in the study and conservation of birds; its K. Lisa Yang Center for Conservation Bioacoustics uses sounds in nature to inform and advance the conservation of wildlife habitats.

 

About David Mann, Ph.D/Founder of Haikubox

David Mann, Haikubox founder, was a young birder who spent hours in his neighborhood and at nearby Sapsucker Woods at Cornell University searching for birds. He later studied biology at Cornell and earned a PhD from MIT and the Woods Hole Oceanographic Institution focused on bioacoustics. When David and long-time colleague Holger Klinck, PhD, Director of the K. Lisa Yang Center for Conservation Bioacoustics at the Cornell Lab of Ornithology, realized they shared a common interest and the technical skills to develop an automatic birdsong identification tool, Haikubox was hatched. 

 

Eating only during the daytime could protect people from heart risks of shift work



A study led by researchers at Mass General Brigham suggests that, when it comes to cardiovascular health, food timing could be a bigger risk factor than sleep timing



Brigham and Women's Hospital




A study led by researchers at Mass General Brigham suggests that, when it comes to cardiovascular health, food timing could be a bigger risk factor than sleep timing

Numerous studies have shown that working the night shift is associated with serious health risks, including to the heart. However, a new study from Mass General Brigham suggests that eating only during the daytime could help people avoid the health risks associated with shift work. Results are published in Nature Communications.

“Our prior research has shown that circadian misalignment – the mistiming of our behavioral cycle relative to our internal body clock – increases cardiovascular risk factors,” said senior author Frank A.J.L. Scheer, PhD, a professor of Medicine and director of the Medical Chronobiology Program at Brigham and Women’s Hospital, a founding member of the Mass General Brigham healthcare system. “We wanted to understand what can be done to lower this risk, and our new research suggests food timing could be that target.”

Animal studies have shown that aligning food timing with the internal body clock could mitigate the health risks of staying awake during the typical rest time, which prompted Scheer and his colleagues to test this concept in humans.

For the study, researchers enlisted 20 healthy young participants to a two-week in-patient study at the Brigham and Women’s Center for Clinical Investigation. They had no access to windows, watches, or electronics that would clue their body clocks into the time. The effect of circadian misalignment could be determined by comparing how their body functions changed from before to after simulated night work.

Study participants followed a “constant routine protocol,” a controlled laboratory setup that can tease apart the effects of circadian rhythms from those of the environment and behaviors (e.g., sleep/wake, light/dark patterns). During this protocol, participants stayed awake for 32 hours in a dimly lit environment, maintaining constant body posture and eating identical snacks every hour.  After that, they participated in simulated night work and were assigned to either eating during the nighttime (as most night workers do) or only during the daytime. Finally, participants followed another constant routine protocol to test the aftereffects of the simulated night work. Importantly, both groups had an identical schedule of naps, and, thus, any differences between the groups were not due to differences in sleep schedule.

The investigators examined the aftereffects of the food timing on participants’ cardiovascular risk factors and how these changed after the simulated night work. Researchers measured various cardiovascular risk factors, including autonomic nervous system markers, plasminogen activator inhibitor-1 (which increases the risk of blood clots), and blood pressure.

Remarkably, these cardiovascular risk factors increased after simulated night work compared to the baseline in the participants who were scheduled to eat during the day and night. However, the risk factors stayed the same in the study participants who only ate during the daytime, even though how much and what they ate was not different between the groups—only when they ate.

Limitations of the study include that the sample size was small, although of a typical size for such highly controlled and intensive randomized controlled trials. Moreover, because the study lasted two weeks, it may not reflect the chronic risks of nighttime versus daytime eating.

A strength is that the study participants’ sleep, eating, light exposure, body posture, and activity schedule were so tightly controlled.

“Our study controlled for every factor that you could imagine that could affect the results, so we can say that it’s the food timing effect that is driving these changes in the cardiovascular risk factors,” said Sarah Chellappa, MD, MPH, PhD, an associate professor at the University of Southampton, and lead author for the paper.

While further research is necessary to show the long-term health effects of daytime versus nighttime eating, Scheer and Chellappa said the results are “promising” and suggest that people could improve their health by adjusting food timing. They add that avoiding or limiting eating during nighttime hours may benefit night workers, those who experience insomnia or sleep-wake disorders, individuals with variable sleep/wake cycles, and people who travel frequently across time zones.

Authorship: In addition to Scheer, Mass General Brigham authors include Lei Gao, Jingyi Qian, Nina Vujovic, Peng Li, and Kun Hu.

Disclosures: Scheer served on the Board of Directors for the Sleep Research Society and has received consulting fees from the University of Alabama at Birmingham and Morehouse University.

Funding: This study was funded by Grant number NIH R01HL118601 (ClinicalTrials.gov number: NCT02291952), 1UL1TR001102 and 1UL1TR002541-01. The funder had no role in the design of the study; in the collection, analyses or interpretation of data; in the writing of the manuscript, or in the decision to publish it.

Paper cited: Chellappa SL et al. “Daytime eating during simulated night work mitigates changes in cardiovascular risk factors: secondary analyses of a randomized controlled trial” Nature Communications DOI: 10.1038/s41467-025-57846-y

For More Information:

Biological Clock Plays Critical Role in Driving Teens’ Late Eating Habits | Mass General Brigham

Daytime Eating May Benefit Mental Health | Mass General Brigham

Study Finds Well-Timed Meals Reduce Risk of Glucose Intolerance Despite Mistimed Sleep

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About Mass General Brigham

Mass General Brigham is an integrated academic health care system, uniting great minds to solve the hardest problems in medicine for our communities and the world. Mass General Brigham connects a full continuum of care across a system of academic medical centers, community and specialty hospitals, a health insurance plan, physician networks, community health centers, home care, and long-term care services. Mass General Brigham is a nonprofit organization committed to patient care, research, teaching, and service to the community. In addition, Mass General Brigham is one of the nation’s leading biomedical research organizations with several Harvard Medical School teaching hospitals. For more information, please visit massgeneralbrigham.org.

 

AI threats in software development revealed in new study from The University of Texas at San Antonio




University of Texas at San Antonio
UTSA Research 

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An example of a large language model. UTSA researchers recently completed one of the most comprehensive studies to date on the risks of using AI models to develop software. In a new paper, they demonstrate how a specific type of error could pose a serious threat to programmers that use AI to help write code.

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Credit: The University of Texas at San Antonio




UTSA researchers recently completed one of the most comprehensive studies to date on the risks of using AI models to develop software. In a new paper, they demonstrate how a specific type of error could pose a serious threat to programmers that use AI to help write code.

Joe Spracklen, a UTSA doctoral student in computer science, led the study on how large language models (LLMs) frequently generate insecure code. His team’s paper has been accepted for publication at the USENIX Security Symposium 2025, a premier cybersecurity and privacy conference.

The multi-institutional collaboration featured three additional researchers from UTSA: doctoral student A.H.M. Nazmus Sakib, postdoctoral researcher Raveen Wijewickrama, and Associate Professor Dr. Murtuza Jadliwala, director of the SPriTELab (Security, Privacy, Trust, and Ethics in Computing Research Lab). Additional collaborators were Anindya Maita from the University of Oklahoma (a former UTSA postdoctoral researcher) and Bimal Viswanath from Virginia Tech.

Hallucinations in LLMs occur when the model produces content that is factually incorrect, nonsensical or completely unrelated to the input task. Most current research so far has focused mainly on hallucinations in classical natural language generation and prediction tasks such as machine translation, summarization and conversational AI.

The research team focused on the phenomenon of package hallucination, which occurs when an LLM generates or recommends the use of a third-party software library that does not actually exist.

What makes package hallucinations a fascinating area of research is how something so simple—a single, everyday command—can lead to serious security risks.

“It doesn’t take a convoluted set of circumstances or some obscure thing to happen,” Spracklen said. “It’s just typing in one command that most people who work in those programming languages type every day. That’s all it takes. It’s very direct and very simple.”

“It’s also ubiquitous,” he added. “You can do very little with your basic Python coding language. It would take you a long time to write the code yourself, so it is universal to rely on open-source software to extend the capabilities of your programming language to accomplish specific tasks.”

LLMs are becoming increasingly popular among developers, who use the AI models to assist in assembling programs. According to the study, up to 97% of software developers incorporate generative AI into their workflow, and 30% of code written today is AI-generated. Additionally, many popular programming languages, like PyPI for Python and npm for JavaScript, rely on the use of a centralized package repository. Because the repositories are often open source, bad actors can upload malicious code disguised as legitimate packages.

For years, attackers have employed various tricks to get users to install their malware. Package hallucinations are the latest tactic.

“So, let’s say I ask ChatGPT to help write some code for me and it writes it. Now, let’s say in the generated code it includes a link to some package, and I trust it and run the code, but the package does not exist, it’s some hallucinated package. An astute adversary/hacker could see this behavior (of the LLM) and realize that the LLM is telling people to use this non-existent package, this hallucinated package. The adversary can then just trivially create a new package with the same name as the hallucinated package (being recommended by the LLM) and inject  some bad code in it. Now, next time the LLM recommends the same package in the generated code and an unsuspecting user executes the code, this malicious package is now downloaded and executed on the user’s machine,” Jadliwala explained.

The UTSA researchers evaluated the occurrence of package hallucinations across different programming languages, settings and parameters, exploring the likelihood of erroneous package recommendations and identifying root causes.

Across 30 different tests carried out by the UTSA researchers, 440,445 of 2.23 million code samples they generated in Python and JavaScript using LLM models referenced hallucinated packages. Of the LLMs researchers tested, “GPT-series models were found four times less likely to generate hallucinated packages compared to open-source models, with a 5.2% hallucination rate compared to 21.7%,” the study stated. Python code was less susceptible to hallucinations than JavaScript, researchers found.

These attacks often involve naming a malicious package to mimic a legitimate one, a tactic known as a package confusion attack. In a package hallucination attack, an unsuspecting LLM user would be recommended the package in their generated code, and trusting the LLM, would download the adversary-1created malicious package, resulting in a compromise.

The insidious element of this vulnerability is that it exploits growing trust in LLMs. As they continue to get more proficient in coding tasks, users will be more likely to blindly trust their output and potentially fall victim to this attack.

“If you code a lot, it’s not hard to see how this happens. We talked to a lot of people and almost everyone says they’ve noticed a package hallucination happen to them while they’re coding, but they never considered how it could be used maliciously,” Spracklen explained. “You’re placing a lot of implicit trust on the package publisher that the code they’ve shared is legitimate and not malicious. But every time you download a package; you’re downloading potentially malicious code and giving it complete access to your machine.”

While cross-referencing generated packages with a master list may help mitigate hallucinations, UTSA researchers said the best solution is to address the foundation of LLMs during its own development. The team has disclosed its findings to model providers including OpenAI, Meta, DeepSeek and Mistral AI.