Pfizer vaccine: Single dose ‘90 per cent effective after 21 days’
A single dose of the Pfizer coronavirus vaccine is “highly protective” after three weeks, according to a study. Researchers at the University of East Anglia (UEA) said the coronavirus vaccine developed by Pfizer and BioNTech was still effective after 21 days without a ‘top up’ dose in the recommended time frame. It comes after a study found that [...]









