The new vaccine regime is to delay the booster shot of the Pfizer vaccine for up to three months. But is the first dose 52% or 90% effective? Show more
Discover 11,128,835 listings and 278,125 playable programmes from the BBC
The new vaccine regime is to delay the booster shot of the Pfizer vaccine for up to three months. But is the first dose 52% or 90% effective? Show more