A systematic review of effectiveness of BNT162b2 mRNA and ChAdOx1 adenoviral vector COVID-19 vaccines in the general population.
Chinonyerem Ogadi IheanachoUchenna I H EzeEmmanuel A AdidaPublished in: Bulletin of the National Research Centre (2021)
BNT162 and ChAdOx1 vaccines were associated with equivalent and high effectiveness which increased with time and a second dose in the general population. This encourages continued practice of other preventive measures, particularly during the first week of vaccination, and reinforces the need for a second dose.