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BA.2 variant more contagious than its world-dominating “big brother”

2022-01-26T17:27:50.040Z


“The evidence is accumulating to demonstrate that there is a small transmissibility advantage of the BA.2 sublineage compared to Omicron (BA.1),” explains Étienne Simon-Lorière, an expert from the Institut Pasteur.


More transmissible, but not more serious.

This is how the first analyzes carried out by the health authorities in Denmark, the most advanced in the world for the virological surveillance of Covid-19, can be summarized about what experts call the “BA.2 sub-lineage”, the little brother of the Omicron variant (BA.1).

Causing fewer serious cases than infection with the Delta variant, but more contagious, Omicron has become the majority worldwide.

It has spread at lightning speed since its discovery, unveiled at the end of November in South Africa.

He was immediately considered

“worrying”

by the WHO, because of its high contagiousness and its risk of immune escape.

At the moment, 45,000 people are infected every day in Denmark, out of 6 million inhabitants, a rate of contamination higher than that of France (7,160 cases per million people, against 5,440 in France, according to Our World in France). Data).

To read also

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Source: lefigaro

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