Omicron boosters are in the works, but will they be needed?
Omicron has many more mutations than previous variants of concern, a fact that raises questions about how effective existing vaccines will be against the new form of the coronavirus.
Moncef Slaoui, the former head of the Trump administration's Operation Warp Speed, says he's "cautiously optimistic" about how well existing vaccines will hold up against omicron, the latest coronavirus variant of concern.
Omicron has more mutations than previous variants, with around 30 mutations on just its spike protein.
That's worrying for virologists, who note that the spike protein is what vaccines use to "teach"
