COVID-19 Vaccine Effectiveness

• Delta variant weakens protection from Pfizer, AstraZeneca COVID-19 vaccines: study

  Those who get infected after two shots of the Pfizer-BioNTech or AstraZeneca vaccine may be of greater risk to others than under previous variants of COVID-19, U.K. study shows

  Health

  Aug 18, 2021
  
• U.K. to assess AstraZeneca coronavirus vaccine as questions swirl over data

  U.K. Health Secretary Matt Hancock said he had asked the Medicines and Healthcare Products Regulatory Agency to determine whether the vaccine ``meets rigorous safety standards.''

  Health

  Nov 27, 2020
  
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• AstraZeneca COVID-19 vaccine manufacturing error raises questions

  The news comes days after the shots were described as 'highly effective' with no mention of why some participants didn't receive as much vaccine as expected.

  Health

  Nov 26, 2020