Cases of a mutated strain of Covid-19 have been detected that may undermine future vaccines.
Source: Denmark to cull up to 17 million mink amid coronavirus fears
Probably the problems with society: Death to fake news.
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Common SARS-CoV-2 mutation may make COVID-19 more susceptible to a vaccine: Mutation is not expected to interfere with effectiveness of vaccines under development
A common strain of coronavirus has mutated to help it spread quickly, but the spike mutation may make SARS-CoV-2 more susceptible to vaccines under development,
