Vaccines provide extra protection for those with immunity from a previous COVID-19 infection - The Daily Star

In a study, researchers aimed to determine whether the four COVID-19 vaccines licenced for use in Brazil – CoronaVac, Oxford-AstraZeneca (ChAdOx1), Janssen (Ad26.COV2.S) and Pfizer-BioNTech (BNT162b2) – offered additional protection against symptomatic infect…

In a study, researchers aimed to determine whether the four COVID-19 vaccines licenced for use in Brazil CoronaVac, Oxford-AstraZeneca (ChAdOx1), Janssen (Ad26.COV2.S) and Pfizer-BioNTech (BNT162b2) … [+1013 chars]

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