A new kind of vaccine, using mRNA technology, was presented to the general public in 2020. Several Covid-19 vaccines use mRNA technology, which had never before been authorised for use in humans.
mRNA vaccines are gene-based technologies (the body’s cells are given genomic instructions to reproduce part of the virus, rather than the standard process of presenting a weaker or inactive virus).
You can dig deeper into the world of mRNA vaccines via our Covid-19 page. New data is continually emerging about the pros and cons of this new approach to vaccination.

Concerns about mRNA vaccines were the push many people needed
to look more deeply at all vaccines.
Page last reviewed: June 2026
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