EU WouldApplyLower Threshold in Assessing Covid-19 Vaccine

The European Union’s chief drug regulator would approve a vaccine against Covid-19 even if trials showed that it was effective in less than half the people who take it, lower than the threshold the U.S. Food and Drug Administration is likely to apply in assessing vaccine candidates for the U.S. population.

According to officials at the European Medicine Agency, the body would be willing to approve a Covid-19 vaccine even if it showed a so-called efficacy rate below 50%, as long as the shot were safe enough to justify the benefits.

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