How effective are COVID-19 vaccines against the variants? – Hello America

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  1. How effective are COVID-19 vaccines against the variants?Hello america
  2. NOT A WORD. Vaccine may be less effective against Delta, study findsThe New York Times
  3. New Study Suggests J Recipients Should Be Boosted To Protect Against Delta VariantYahoo News
  4. Johnson & Johnson vaccine much less effective against delta variant, new study findsCNBC Television
  5. Covid-19 pandemic: updates and live news for July 21, 2021Bloomberg
  6. See full coverage on Google News

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