The Pfizer vaccine could be effective against the 2 most dangerous COVID-19 variants, according to new data

The Pfizer/BioNTech vaccine demonstrated 95% efficacy in preventing COVID-19 in December, 2020.
Dado Ruvic/Reuters
The Pfizer vaccine triggers a strong response against two prominent COVID-19 variants, per a new study.
The variants — first found in the UK and South Africa — led to fears that vaccines might not work on them.
The study appears to rebut that theory, but the results are preliminary and not yet peer-reviewed. 
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