Viruses mutate all the time but only some mutations affect their ability to spread or evade prior immunity from vaccination or infection, or the severity of disease they cause.
Nearly 44,000 Israelis tested positive for COVID-19 on Monday • 1,161 are in critical condition, 288 on ventilators.
Dr. Dorit Nitzan explains the difference between Omicron and the new sub-variant, and why there may be bigger issues at hand.
The next major COVID-19 variant will be more contagious than Omicron, but not necessarily more severe.
Hamsters were found to have brought the Delta variant back to Hong Kong. They are the second known animal to be able to infect humans with COVID-19, after minks.
The World Health Organization (WHO) cautioned against making such conclusions before further study can be done.
New research indicates the 46 mutations found in the COVID-19 Omicron variant have rendered antibodies ineffective, accounting for the high number of re-infections and breakthrough cases.
'Let’s not merge names of infectious diseases and leave it to celebrity couples,' instead, one researcher tweeted.
A new COVID-19 variant has a similar genetic background to the Delta variant, together with 10 mutations from Omicron
New research from Cedars-Sinai is the first to report not only the presence of elevated autoantibodies after mild or asymptomatic infection, but their persistence over time.