A group of Qatari and American doctors led by an adjunct professor at the Qatari branch
The authors analyzed the vaccination of Qatari residents: 73% of citizens received two doses of Pfizer or Moderna from January to August 2021.
As a result, it turned out that both vaccines prevented a large number of cases of infection, but their effectiveness turned out to be quite different.
According to scientists, the Pfizer vaccine failed to prevent about 300 cases of infection with the Indian strain, but the Moderna vaccine did not protect just over 50 people from infection.
Our observations show that the effectivenessPfizer's vaccine against the spread of the delta strain of coronavirus was about 53%, while the effectiveness of the Moderna vaccine is close to 85%. Both drugs reduced the number of severe cases and deaths from COVID-19 by 90-99.9%.
Research text
It is also noted that the number of hospitalizations and deaths from severe forms of COVID-19 has dropped to almost zero.
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