Are Covid-19 vaccines losing effectiveness against Delta variant?source https://www.indiatoday.in/coronavirus-outbreak/story/vaccine-effectiveness-delta-variant-covid-19-wanes-time-us-cdc-1844894-2021-08-25?utm_source=rss
Tuesday, 24 August 2021
Vaccine effectiveness against Delta variant of Covid-19 wanes over time: US CDC
Are Covid-19 vaccines losing effectiveness against Delta variant?source https://www.indiatoday.in/coronavirus-outbreak/story/vaccine-effectiveness-delta-variant-covid-19-wanes-time-us-cdc-1844894-2021-08-25?utm_source=rss
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