COVID-19: Single vaccine dose boosts protection in previously infected
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A single dose of COVID-19 vaccine boosts protection against SARS-CoV-2 coronavirus variants, but only in those previously infected with the disease, according to a study. The researchers looked at the UK and South Africa variants, however, they think, it is possible that the findings will apply to other variants in circulation, such as the Brazil (P.1) and India (B.1.617 and B.1.618) variants.