The South African covid-19 variant is proving to be a vaccine challenge

The South African covid-19 variant is proving to be a vaccine challenge
The news: US company Novavax has today announced that its covid-19 vaccine was found to be 89% effective in final-stage clinical trials in the UK. It discovered the vaccine protects people with the UK covid-19 variant, known as B.1.1.7, but is less effective against the variant sequenced in South Africa, known as B.1.351.  The details:…
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