Prime Minister Castex: France ready to move to COVID vaccine 4th shot in due time

French Prime Minister Jean Castex said on Thursday that France was ready to deploy a fourth COVID-19 vaccination or second booster shot as soon as health authorities gave their green light to such a move. "When the health authorities will give us the go-ahead, we'll go for it," Castex told BFM TV and RMC Radio.

The fourth dose of COVID-19 vaccine boosts antibodies five-fold a week after the shot is administered, Israeli Prime Minister Naftali Bennett said on Tuesday, citing preliminary findings of an Israeli study.