Donors must meet certain criteria, including COVID illness and recovery within the last several months, so that antibodies will be relevant for newer variants of the virus

Researchers apply AI to unique database of healthcare workers' blood samples to determine best antigen to protect against multiple pathogens and variants

Sirst ‘recombination’ variant of the coronavirus, uniting aspects of Delta and Omicron, said found in Israeli samples

Alon Helfgott has officially been infected with Alpha, Delta, and now Omicron; says he entered quarantine 3-4 times since start of school year

As most of world’s young kids not yet eligible, research shows kids living with 2 inoculated parents during Alpha outbreak had 72% fewer infections than unvaxxed parents’ offspring

Research finds third dose at least 90% effective at preventing hospitalizations for COVID-19, during both the Delta and Omicron waves

But authors of paper warn against depending on infection, given the higher risks of hospitalization, long-term impacts and death

One healthcare provider says it believes 10 died after refusing Regeneron's treatment; medication offered at no cost to patients since September, with priority to the unvaccinated

UN health agency says majority of cases driven by Omicron, numbers rising even further after a 'tsunami' of disease last week

Though coronaviruses can combine, scientists believe alleged hybrid mutation identified in Cyprus was likely caused by contamination