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WHO

The effects of virus variants on COVID-19 vaccines
Website
The effects of virus variants on COVID-19 vaccines

Image: WHO

Format

Topics

variants, efficacy, safety, monitoring

Languages

English

Description

All viruses – including SARS-CoV-2, the virus that causes COVID-19 – evolve over time. When a virus replicates or makes copies of itself, it sometimes changes a little bit, which is normal for a virus. These changes are called “mutations”. A virus with one or more new mutations is referred to as a “variant” of the original virus.

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