A health worker prepares a shot of the AstraZeneca Covid-19 vaccine in Hanoi, Vietnam. Photo: EPA-EFE A health worker prepares a shot of the AstraZeneca Covid-19 vaccine in Hanoi, Vietnam. Photo: EPA-EFE
A health worker prepares a shot of the AstraZeneca Covid-19 vaccine in Hanoi, Vietnam. Photo: EPA-EFE

Explainer |
Coronavirus: why do we need booster shots, and could mixing Covid-19 vaccines boost immune response?

  • Giving smaller portions in multiple shots is often better than a large dose of vaccine in a single shot
  • It’s also possible to generate greater immunity if we use different vaccines, one after the other, rather than repeating the same jab

Topic |   Coronavirus pandemic
A health worker prepares a shot of the AstraZeneca Covid-19 vaccine in Hanoi, Vietnam. Photo: EPA-EFE A health worker prepares a shot of the AstraZeneca Covid-19 vaccine in Hanoi, Vietnam. Photo: EPA-EFE
A health worker prepares a shot of the AstraZeneca Covid-19 vaccine in Hanoi, Vietnam. Photo: EPA-EFE
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