Fact Check: Pfizer Vaccine Clinical Trial NOT Intended To Test Transmission Prevention — That’s Not How Clinical Trials Work

Did a Pfizer representative “admit” the company erred when its COVID-19 vaccine was “never tested on preventing transmission” of the virus during clinical trials? No, that’s not true. Vaccine clinical trials for drug approval are not meant to test that. Clinical trials are intended to check the safety and efficacy of new drugs and vaccines before they are approved for widespread use. Testing for the prevention of disease transmission is not typically part of initial trials, according to vaccine experts.

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