WHO experts weigh in on COVID-19 vaccine dose interval

The World Health Organization (WHO) vaccine advisory group today weighed in with recommendations for delivering the Pfizer-BioNTech vaccine, urging the vaccine doses be given 21 to 28 days apart in most circumstances, but in certain situations allowing for an interval of up to 6 weeks. The new guidance comes as countries rush to get their vaccination drives up and running as they face the prospect of wider circulation of more transmissible SARS-CoV-2 variants. It also comes just days after the WHO announced its first emergency use listing for a COVID-19 vaccine, the one from Pfizer-BioNTech.