The Food and Drug Administration is expected to authorize new COVID-19 booster shots this week without a staple of its normal decision-making process: data from a study showing whether the shots were ...

With the rise of omicron came the fall of long-lasting protection from reinfection with the pandemic coronavirus SARS-CoV-2, according to a study published in Nature. Using population-wide data from ...

(NEXSTAR) – On Tuesday, the Centers for Disease Control and Prevention added two new subvariants to its online tracker: BA.4 and BA.5. Both are subvariants of the omicron variant of COVID-19, which ...

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Health officials and scientists around the world continue to keep track of any new variations and variants of the SARS-CoV-2 coronavirus. Now new omicron subvariants have emerged in South Africa and ...

The omicron variant of SARS-CoV-2, the virus that causes COVID-19, has now been around for more than a year. Before omicron became dominant, there had been a quick succession of named variants of ...