The boss of the drugmaker Moderna has warned that Covid-19 vaccines are unlikely to be as effective against the Omicron variant in comments that have added to uncertainty about its impact and unsettled financial markets.
“There is no world, I think, where [the effectiveness] is the same level we had with Delta,” Stéphane Bancel told the Financial Times. “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’.”