Hiroshi Nishiura

The omicron variant of Covid-19 is 4.2 times more transmissible in its early stage than delta, according to a study by a Japanese scientist who advises the country's health ministry, a finding likely to confirm fears about the new strain's contagious

The omicron variant of Covid-19 is 4.2 times more transmissible in its early stage than delta, according to a study by a Japanese scientist who advises the country's health ministry, a finding likely to confirm fears about the new strain's contagious