This week, the FDA and CDC authorized Pfizer and Moderna to start administering vaccine boosters that have been reengineered to specifically target the Omicron BA.4 and BA.5 variants that caused this ...

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 ...

The latest Omicron subvariant, XBB.1.5, is the most transmissible strain of COVID yet — but does not seem to make people sicker, the World Health Organization has said. XBB.1.5 has spread quickly ...

A new study found that protection from the Omicron variant waned 6 months after the second dose of a COVID-19 vaccine in older patients. Older patients saw reduced protection against the SARS-CoV-2 ...

New York City health officials are warning residents that the infectious omicron subvariant XBB.1.5 may be more likely to infect people who have already been vaccinated or infected with COVID-19.

The BA.2.75 sublineage of the B.1.1.529 (omicron) variant of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) may escape neutralizing antibodies. The BA.2.75 sublineage (primarily the BA.2 ...

Jan 20 (Reuters) - The fast-spreading Omicron XBB.1.5 is estimated to make up nearly half of U.S. COVID-19 cases, data from the Centers for Disease Control and Prevention (CDC) showed on Friday, ...

In a recent study posted to the bioRxiv* preprint server, researchers discovered that the spike protein of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is susceptible to cleavage at ...

The dominant variant of the coronavirus has proved to be not only staggeringly infectious, but an evolutionary marvel. By Carl Zimmer By November 2021, nearly two years after the coronavirus emerged ...

A study led by Osaka University recently found that the sensitivity of rapid antigen tests (RATs) for the Omicron variant of COVID-19 when compared with polymerase chain reaction (PCR) tests was 0.63 ...