German pharmaceutical firm BioNTech has said there is no need to change its Covid-19 vaccine despite the increasing prevalence of new variants which carry mutations that may make current shots less effective.
In a quarterly financial results press release on Monday, BioNTech, who is working with Pfizer to deliver one of the world’s most-administered Covid-19 shots, said it was prepared to tweak its current vaccine formula but doesn’t think it needs to.
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