Concerns About Covid-19 Vaccine Efficacy Grow As Delta Variant Spreads

Concerns about COVID-19 vaccine efficacy grow as delta variant spreads

WCVB Channel 5 Boston

Concerns over COVID-19 Delta variant grow as pace of spread continues to rise

Growing Concern Over Covid Delta Variant

COVID-19 concerns grow as Delta variant cases rise in U.S.

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Health expert: Vaccine hesitancy causing concern as Delta COVID-19 variant spreads

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Delta variant fuels concerns of fourth coronavirus wave as cases rise across the U.S.

Health Officials Work to Increase Vaccinations as Delta Variant Spreads

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New COVID-19 cases triple over past month as delta variant spreads

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Delta COVID-19 variant rapidly spreads through Michigan

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