A newly identified group of viruses may help suppress eukaryotes’ immune response and promote tolerance of endosymbiotic bacteria.

Researchers suggest the viruses can help endosymbiotic bacteria get along with their hosts.

Health officials are rushing a genetically engineered product into the field to counter uncontained outbreaks of vaccine-derived polio.

Roughly a quarter of 38 viral samples from people treated with Xofluza had mutations in their genomes that made the pathogens less susceptible to the drug.

The Johns Hopkins University researcher’s work helped solidify the link between human papillomavirus and cervical cancer, leading to the approval of the HPV vaccine in 2006.

A study of hundreds of gay couples finds that HIV-positive men taking antiretroviral medication don’t pass the virus to their partners, even when having unprotected sex.

It’s the first time the deadly pathogen has been found in West Africa.

Some patients could suppress the virus without antiretroviral therapy for months after the drug infusions.

Lab mice suffering from inexplicable renal failure turn out to be infected with a hitherto unknown virus.