As COVID-19 sweeps the world, related viruses quietly circulate among wild animals. A new study shows how SARS-CoV-2, the virus that causes COVID-19, and SARS-CoV-1, which caused the 2003 SARS ...

Nov. 18 (UPI) --The world's most well-studied viruses are tiny viruses that make us sick, but Earth hosts a great diversity of viruses, many of them harmless, some of them giant and most of them ...

Evolution optimizes all creatures, from viruses to elephants, to their environment. Where do new variants come from, especially Omicron which is so different from previous variants? There may be a ...

An exchange of genetic material that occurred when ancient giant viruses infected ancient eukaryotic cells could have caused the nucleus of the eukaryotic cell -- its defining feature -- to form. A ...

In the early, uncertain days of the coronavirus pandemic, scientists delivered one comforting pronouncement: The virus that caused COVID mutates rather slowly. If that remained true, the virus would ...

A new study shows how the virus that causes COVID-19 is related to the virus that caused the SARS outbreak of 2003. The new family tree of these viruses could help predict which viruses circulating in ...