The Food and Drug Administration’s paper on the Pfizer COVID-19 vaccine revealed how well one dose can work.
The Food and Drug Administration’s paper on the Pfizer COVID-19 vaccine revealed how well one dose can work. FDA.gov
Herb Scribner
By Herb Scribner

A new chart featured in a Food and Drug Administration paper shows how well the COVID-19 vaccine works after only one dose.

  • The chart shows that the COVID-19 vaccine from Pfizer and BioNTech starts to become effective 10 days after injection.
  • The vaccine will then remain effective for four months after that.
  • People who received one dose of the vaccine had minor reactions that last a few days.

Here’s the full graph, which you can find in the FDA’s paper on the vaccine. The red line indicates those who took the placebo and got COVID-19. The blue line is those after their first COVID-19 vaccine dose.

The Food and Drug Administration’s paper on the Pfizer COVID-19 vaccine revealed how well one dose can work.
FDA.gov

What the FDA said about the vaccine

The Food and Drug Administration said in the detailed analysis that the COVID-19 vaccine from Pfizer/BioNTech has “met the prescribed success criteria,” according to The Wall Street Journal.

  • This suggests the FDA will approve the COVID-19 vaccine for widespread distribution in the United States.
  • “Among other issues, the data are expected to show how the vaccine works with different age, ethnic and other demographic groups,” WSJ reports.
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