Tag: Valve style facemask
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...