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The Delta variant of the coronavirus, responsible in particular for a rebound in contaminations in the United Kingdom, is still very “in the minority” in France, but in “increase” in surveillance data, Public Health France indicated on Friday. During a “flash investigation” of sequencing carried out on May 25, this variant initially detected in India was found in 1% of samples, against 0.2% in the previous investigation, on May 11, said SPF in its weekly point.

The government agency said it was following this “increasing diffusion” of the Delta variant with “the greatest attention, given its increased transmissibility (…), a possible increase in the severity of the infection and preliminary data. in favor of a slightly reduced vaccine efficacy, especially during an incomplete vaccination schedule “.

For the moment, the Alpha variant (known as British) confirms its “predominance”, with 86.3% of the 1,723 samples sequenced during the “flash” survey, against 5.6% for the Beta variant (known as South African) and 1.1% for the Gamma variant (said to be Brazilian).