Existing Covid vaccines could be much less effective against the Omicron variant of the virus. This is the alarm raised by the CEO of Moderna, Stephane Bancel, in an interview with the Financial Times, according to which the high number of mutations of the new Spike protein strain and the rapid spread of the variant suggest that vaccines current will have to be changed next year. “I think there will be a material decline (in efficacy, ed). I don’t know how much, because we have to wait for the data. But all the scientists I’ve talked to … they say ‘this is not good,'” Bancel said.