The European Medicines Agency (EMA) has said it will not bring in a minimum efficacy threshold for Covid-19 vaccines. The comment comes after clinical trials showed Germany’s CureVac jab to be only 47% effective against the virus.
CureVac announced data on the efficacy of its jab on Wednesday after it was tested in second- and third-phase trials involving 40,000 people across ten countries.
The company suggested variants of the virus may be behind the poor result.
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On Thursday, the EMA’s vaccine chief Marco Cavaleri said it was “a bit early to say” after being asked by a journalist about the CureVac results and the threat variants may pose to vaccine efficacy.
“We will need to collect all the final data from this clinical trial, and have a good analysis of the outcome throughout different regions, age groups and according to different variants,” he told an EMA briefing.
Asked specifically about a 50% efficacy minimum level for vaccines, he added that the EMA had “always felt it was difficult to define upfront a threshold.”
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