B.1.1.529 Omicron: Valve-style face mask may have caused cross-infection between vaccinated, quarantined patients

A Covid-19 patient whose valve-style face mask was blamed for a cross infection in a quarantine hotel last week has been found to be carrying a new variant of the virus with a high number of mutations, marking the first known appearance of the strain in Hong Kong.  More...

South Korea: Nearly half of recent Covid cases in Seoul are vaccine breakthrough infections

“Of the 646 new cases confirmed in Seoul on Sunday, 49.4 percent, or 319 cases, were breakthrough cases,” Park Yoo-mi, a disease control official at the Seoul metropolitan government, said in a briefing.  More...