Combining vaccines is being researched in the UK
As new variants emerge — with estimates that there are 4,000 of them — studies into combining different types of vaccines is already under way
04 February 2021 - 16:42
London — The world faces about 4,000 variants of the virus that causes Covid-19, prompting a race to improve vaccines, Britain said on Thursday, as researchers begin to explore mixing doses of the Pfizer and AstraZeneca shots in a world first.
Thousands of variants have been documented as the virus mutates, including British, SA and Brazilian variants, which appear to spread more swiftly than others...
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