Study: Pfizer, AstraZeneca Vaccines Effective Against Delta The differences in effectiveness against the Alpha vs Delta variants were modest when both doses of each vaccine were completed, but markedly different after only one dose.

study pfizer astrazeneca vaccines effective against delta the differences in effectiveness against the alpha vs delta variants were modest when both doses of each vaccine were completed but markedl

Sumary of Study: Pfizer, AstraZeneca Vaccines Effective Against Delta The differences in effectiveness against the Alpha vs Delta variants were modest when both doses of each vaccine were completed, but markedly different after only one dose.:

  • 1.1.7), according to a study published online Wednesday in the New England Journal of Medicine.
  • Researchers, led by Jamie Lopez Bernal, PhD, from Public Health England, write that the lower effectiveness against the Delta variant is particularly evident after a single dose, but even after two doses they were less effective.

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