U.S. vaccination rollout gathers speed, as threat of variants grows
Amid signs of progress, scientists warned the spread of coronavirus variants must be contained before they become dominant. — NYT: Top Stories
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Tag: Variants
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As virus variants spread, ‘No one is safe until everyone is safe’
Rich countries are buying up coronavirus vaccines, leaving poorer regions vulnerable — and as potential breeding grounds for variants, like one found in South Africa, that could make vaccines less effective. — NYT: Top Stories