Moderna's CEO says current COVID-19 vaccines likely won't work as well against Omicron

Existing coronavirus vaccines are likely to be less effective against the emerging Omicron variant, Moderna CEO Stéphane Bancel predicted on Tuesday.

"There is no world, I think, where [the effectiveness] is the same level ... we had with [the] Delta [variant]," he told the Financial Times, while noting that that the drugmaker is still testing its vaccine on Omicron.