Moderna CEO says vaccines likely less effective against Omicron

The head of drugmaker Moderna said Covid-19 vaccines are unlikely to be as effective against the Omicron variant of the coronavirus as they have been against the Delta variant. "There is no world, I think, where (the effectiveness) is the same level . . . we had with Delta," Moderna Chief Executive Stéphane Bancel told the Financial Times in an interview. "I think it's going to be a material drop. I just don't know how much because we need to wait for the data. But all the scientists I’ve talked to . . . are like 'this is not going to be good'’."