RELATED: COVID-19 vaccine makers exploring if omicron versions of shots are needed The U.N.
health agency’s assessment came as a widening circle of countries around the world reported cases of the variant and moved to slam their doors in an act-now-ask-questions-later approach while scientists race to figure out just how dangerous the mutant version might be.
On Monday, officials from the top COVID-19 vaccine makers say it will take 100 days or less to develop and ship a shot that specifically targets the omicron variant, if needed, amid heightened concern over its spread.