Do you need a 4th dose of a COVID-19 vaccine? There’s no one-size-fits-all answer – CBC

Mar 30, 2022

Age, risk level, future variants are all factors in whether future boosters may be needed, experts say

In clinical trials, multiple leading COVID-19 vaccines were tested as a two-shot regimen. In the real world, three doses have proven to offer strong protection against serious illness. And now, in multiple countries, fourth doses are being explored as a way to ward off waning immunity.

So does that mean you should rush out and get another shot if the opportunity arises? Not necessarily.

The human immune system is a broad, multi-faceted defence network. It starts off rather immature in your infancy, typically sharpens as you age, and tends to struggle more to fight off pathogens in your golden years.

Do you need a 4th dose of a COVID-19 vaccine? There’s no one-size-fits-all answer – CBC

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