All articles tagged with #virology
A Nature study mutated almost every nucleotide of phage ΦX174, generating over 44,000 variants and assessing their fitness in E. coli. Most single-nucleotide changes were harmful, with AI models struggling to predict these effects, underscoring the need for more experimental data to train biology-focused AI and revealing the current limits of AI in genome design.
Scientists trained an AI on natural viral DNA patterns and used it to generate entirely new virus genomes. In a study published in Science, 16 AI-designed viruses were viable, sparking optimism about potential medical advances while highlighting dual-use risks and biosecurity concerns.
Two NIH virologists are charged with allegedly smuggling non-infectious monkeypox samples into the United States after fieldwork in Congo, with authorities saying the samples contained MPXV DNA but were not infectious. The case has triggered political scrutiny of the Rocky Mountain Laboratories and renewed debate over import rules and lab biosecurity, as hearings are set for the involved researchers.
Researchers at France's Pasteur Institute have sequenced the Andes virus genome, a milestone for hantavirus surveillance, as authorities monitor related cases such as suspected hantavirus infections on the MV Hondius cruise ship in France.
Researchers have identified a previously uncharacterized receptor gateway used by certain bat alphacoronaviruses to enter human cells, providing new insight into how animal coronaviruses can spill over into humans and how entry mechanisms influence pandemic risk.
Brazilian police recovered missing virus samples from Unicamp’s high-security BSL-3 lab—including chikungunya and dengue—after a researcher, Soledad Palameta Miller, was arrested and later released on bail; the case has raised questions about access controls at secure facilities as Brazil plans its first BSL-4 lab nearby, while investigators probe motives and security gaps and regulators say the samples did not pose health risks.
The CDC says the BA.3.2 COVID variant, descended from Omicron, has been detected in 25 U.S. states (via nasal swabs and wastewater) and was first identified in travelers, but it is not the dominant strain and does not appear to cause a different illness; current vaccines target other Omicron subvariants, so protection may be incomplete.
A case study reports progressive multifocal leukoencephalopathy (PML) caused by JC virus activation in a 72-year-old patient with stage-5 CKD, suggesting CKD can create noncanonical immunosuppression that predisposes to JC virus–related brain damage. The JC virus is common and usually latent but can reactivate to destroy brain myelin, diagnosed by MRI lesions and JC virus DNA in CSF; the patient died two days after diagnosis, highlighting the seriousness of PML in CKD as CKD prevalence rises.
A UC San Diego‑led genomic analysis of Ebola, Marburg, mpox, influenza A, and SARS‑CoV‑2 finds no evidence that most pandemic viruses required adaptation in an animal reservoir or in a lab before infecting humans; selection changes usually appear after human transmission. The study does note a possible lab‑linked signal for the 1977 H1N1 influenza and cites palm civet–associated SARS‑CoV as a historical example, but argues SARS‑CoV‑2 likely arose through natural zoonotic transmission. The authors stress that distinguishing natural spillovers from lab mishandling relies on genomic signals and call for strengthened surveillance and spillover prevention to prepare for future pandemics, challenging theories that COVID‑19 was lab‑engineered.
UC San Diego researchers analyzed genomes from influenza A, Ebola, Marburg, mpox, SARS-CoV and SARS-CoV-2 and found that most zoonotic viruses do not show adaptive evolution before jumping to humans; SARS-CoV-2 shows no lab-adaptation signal, consistent with natural spillover, while the 1977 H1N1 pandemic shows lab-adaptation signatures—together providing a framework to distinguish natural outbreaks from laboratory manipulation and guiding future outbreak surveillance.
A virologist and home brewer, Chris Buck, claims to have created the world's first beer-based vaccine using genetically modified yeast, which he believes can immunize against certain viruses and potentially be used for other diseases like COVID-19 and flu. Despite concerns from the scientific community about safety and public trust, Buck has already brewed and tested his vaccine beer on himself, showing promising antibody responses, and aims to develop it further for broader use.
David Baltimore, a pioneering virologist whose discovery of reverse transcriptase revolutionized understanding of retroviruses and contributed significantly to cancer and HIV/AIDS research, has passed away at age 87. His work challenged the central dogma of molecular biology and provided essential tools for modern genetic research.
David Baltimore, a Nobel Prize-winning virologist, former Caltech president, and influential scientist known for discovering reverse transcriptase, passed away at age 87. His groundbreaking work in molecular biology, immunology, and science policy significantly advanced medicine and biotechnology. Baltimore's leadership at Caltech and contributions to global health and science policy left a lasting legacy. He is survived by his wife Alice Huang and daughter TK Baltimore.
David Baltimore, a Nobel laureate and former Caltech president renowned for his groundbreaking work in virology and genetic engineering, passed away at 87. His career was marked by significant scientific discoveries, leadership in bioethics, and influential roles in academia and industry, leaving a lasting legacy in biology and medicine.
The Democratic Republic of the Congo has declared its 16th Ebola outbreak, with genomic analysis indicating a new spillover event from an unknown reservoir, distinct from previous outbreaks, confirmed through rapid sequencing and phylogenetic analysis.