What Does a 95% Effective Vaccine Really Mean?

The video discusses the efficacy rates of COVID-19 vaccines, explaining how these numbers are derived from phase III clinical trials. It highlights the differences in trial designs and criteria among Pfizer, Moderna, and Janssen vaccines, emphasizing that direct comparisons are misleading. Despite varying efficacy rates, all vaccines are effective in preventing deaths. The video also distinguishes between efficacy in trials and real-world effectiveness, noting factors like community vaccination rates and virus variants that could influence outcomes.

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