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covid vaccine, covid delta, delta covid, mRNA vaccines covid, pfizer covid, covid pfizer, moderna covid, covid moderna, delta variant covid, alpha variant covid A vaccine brand appears to offer more protection against the Delta variant.
covid lambda variant, lambda covid, delta covid, covid delta, alpha covid, covid alpha, covid vaccine, covid Another variant has reached almost 30 nations in WHO regions.
The Oxford vaccine data hints at potential to limit transmission.
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