Rare bacterial infections, such as invasive strep A, are popping up around the United States and Europe, with unusual effects for children.

Researchers from the French National Centre for Scientific Research have revived more than a dozen prehistoric viruses that were previously trapped deep within the Siberian permafrost, according to a pre-print study.

Vaccine against all strains of virus hailed as major step in protecting against potentially devastating flu pandemic

Seven viruses from the Siberian permafrost have been revived and replicated themselves in the lab – including the oldest revived so far

Genome analysis finds SARS-CoV-2 and bat coronaviruses shared an ancestor just a few years ago, but extensive recombination has muddied the picture.

The Arctic—that remote, largely undisturbed, 5.5 million square miles of frozen terrain—is heating up fast. In fact, it’s warming nearly four times quicker than the rest of the world, with disastrous consequences for the region and its inhabitants. Many of these impacts you probably know from nature documentaries: ice caps melting, sea levels rising, and polar bears losing their homes. But good news! There is another knock-on effect to worry about: the warming landscape is rewiring viral dynamics, with the potential to unleash new pathogens.

A string of about 30,000 genetic letters were all that it took to start the nightmare of covid-19, the death toll from which is likely to be more than 20m. Exactly how this story began has been hotly contested. Many think that covid-19’s emergence was a zoonosis—a spillover, as so many new pathogens are, from wild animals, for it resembles a group of coronaviruses found in bats.

Analysis of Arctic lake suggests viruses and bacteria locked in ice could reawaken and infect wildlife

In a laboratory study, human epithelial cells were treated with the lubricant before being exposed to HIV or a herpes virus, with subsequent infection rates being as low as 20 per cent.

Key is whether the gene-editing technology can stop the virus from replicating.

The pandemic coronavirus' debut wrought universal havoc—not even seasonal flu viruses were spared. Amid travel restrictions, quarantines, closures, physical distancing, masking, enhanced hand washing, and disinfection, the 2020-2021 flu season was all but canceled. That meant not just an unprecedented global decrease in the number of people sick with the flu but also a dramatic collapse in the genetic diversity of circulating flu strains.

A new SARS-CoV-2-like virus discovered in Russian bats is capable of infecting humans, and is resistant to current vaccines against COVID-19, a study has found. A team led by researchers at Washington State University (WSU), US, found spike proteins from the bat virus, named Khosta-2, can infect human cells and is resistant to both the antibody therapies and blood serum from people vaccinated for SARS-CoV-2.

With signs of poliovirus spreading in a handful of counties in New York, unvaccinated people could be at risk of paralytic polio.

A sensor built into a mask was able to detect the COVID-19, H5N1 and H1N1 influenza viruses in the air within 10 minutes and send notifications to a device, according to the study led by six scientists working with Tongji University in Shanghai.

Researchers at the University of British Columbia have discovered what they describe as a "weak spot" in all major variants of the virus that causes COVID-19 — a revelation they believe could open the door for treatments to fight current and future mutations.

Climate change has exacerbated more than 200 infectious diseases and dozens of non-transmissible conditions, such as poisonous-snake bites, according to an analysis1. Climate hazards bring people and disease-causing organisms closer together, leading to a rise in cases. Global warming can also make some conditions more severe and affect how well people fight off infections.

NEW YORK (AP) — The polio virus has been found in New York City’s wastewater in another sign that the disease, which hadn’t been seen in the U.S. in a decade, is quietly spreading among unvaccinated people, health officials said Friday.

Conservationists have called for ministers to ban the release of millions of gamebirds to prevent the UK’s wild birds being wiped out by a “catastrophic” avian flu epidemic this winter. The Royal Society for the Protection of Birds (RSPB) said there was a significant risk that pheasants, partridge and ducks released for shooting from 1 October could spread avian influenza into wild bird populations, wreaking havoc in farmland and garden birds.

One case involved a man with cancer who underwent a specialized stem cell transplant; the other involved a woman who received immune-boosting therapies as part of a clinical trial.

Covid-19 infections can lower sperm count and the virus may even bind to receptors on the surface of sperm cells. However, there is no evidence to suggest that the effects differ to those seen after other illnesses that involve fever, such as the flu.