Coronavirus – Delta variant: a 90% to 95% immunity required to control the epidemic

Published by Rizhlaine F. · Photos by My B. · Published on 10 July 2021 at 09h52 · Updated on 10 July 2021 at 10h45
Because of the Delta variant, the threshold to reach herd immunity has been reviewed upwards. According to the Scientific Committee, reaching 90% to 95% of vaccinees or contaminated people is necessary to hope and control the epidemic.

As the coronavirus epidemic significantly decreased in France, the threat of variants is now a game-changer. The UK variant – called Alpha – more contagious than the historic strain, originated a third wave before dominating the French territory. But there is another challenger joining in.

This time, this is the Delta variant, the same mutant that originated a sharp boom in cases in India. It is 60% more contagious than the Alpha strain. As a consequence? Its high contagiousness jeopardizes the fragile balance in the country. It spreads so swiftly it is now dominating. And it might also originate a fourth epidemic wave.

The arrival of the Delta variant leads scientists and elected representatives to adapt. The Scientific Committee reviewed the herd immunity threshold upwards: reaching 90% to 95% of vaccinees or contaminated people is necessary to hope and control the Covid-19 epidemic. For the record, to date 52.70% of the French have been given at least one injection, and 39.30% of the population is fully vaccinated.

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