Aug. 3, 2021, 10:40 a.m.
(ABC News) The delta variant is more contagious than its predecessors, but COVID-19 vaccines still provide strong protection against it
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Aug. 3, 2021, 10:40 a.m.
(ABC News) The delta variant is more contagious than its predecessors, but COVID-19 vaccines still provide strong protection against it
Login to grade this article.