Covid: Vaccine efficacy diminished as Delta arose, US report shows

The effectiveness of Covid-19 vaccines among front-line workers declined to 66% after the delta variant became dominant, compared with 91% before it arose, according to a report from the US Centers for Disease Control and Prevention.

from World News Headlines, Latest International News, World Breaking News - Times of India https://ift.tt/3guNcQl
August 25, 2021 at 10:16AM

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