A medical worker prepares to dilute a vial of Pfizer-BioNTech vaccine at a Covid-19 vaccination centre, March 8, 2021. Reuters
A medical worker prepares to dilute a vial of Pfizer-BioNTech vaccine at a Covid-19 vaccination centre, March 8, 2021. Reuters
Pfizer-BioNTech Covid-19 vaccine neutralises Brazil variant in lab study
The Brazil Covid-19 variant has been called a 'variant of concern by the World Health Organisation
