A real-world test of Pfizer and BioNTech's COVID-19 vaccine has confirmed its efficacy rate is well above 90 percent.
According to a study led by a research institute and university in Israel, together with Harvard University,… the vaccine was shown to be 94-percent effective after two doses.
This number shows comparable effectiveness to the rate established in phase three clinical trials,… which was 95-percent.
It estimated the vaccine to be 57 percent effective after one dose.
The test was carried out on some 1.2 million people, with half of the participants receiving shots.