Why a year is 'long term' for vaccine safety

"We don't know the long-term side effects of Covid vaccines." That's a claim that's still common to see shared online.

But a year is actually considered relatively "long term" when it comes to vaccine safety.

This week marks the anniversary of the first delivery of Covid-19 vaccines under the Covax scheme - as well as being more than 14 months since the first dose was given.

And scientists explain that's enough time for all but the rarest side effects to have emerged.

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Source: BBC News, 25 February 2022