A central mutation that has appeared in two new coronavirus variants can still be targeted by the Pfizer/BioNTech vaccine, laboratory studies show.
This is, however, just one of the mutations found in the latest forms of the virus.
Therefore, although the research has been approved, it is not seen as conclusive scientific proof of how the vaccine would work.
In the UK and South Africa, new variants have been identified.
Both forms of the virus are spreading faster and this has raised concerns about the degree of protection that vaccines can provide against them.
The popular view is that vaccines will still work, but researchers are on the lookout for evidence.
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