The company reported that a lower dose of the vaccine was 90.7 percent effective in preventing symptomatic Covid-19 in a clinical trial.
USA: Pfizer Says Its Vaccine Is Highly Effective in 5- to 11-Year-Olds
![USA: Pfizer Says Its Vaccine Is Highly Effective in 5- to 11-Year-Olds]()
Reviewed by Shahid Karimi
on
October 22, 2021
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