Covid-19: is there really a breakthrough for the XBB.1.5 variant in the North?

“The XBB.1.5 variant is progressing rapidly in the north”, can we read on social networks. This new version of SARS-CoV-2 belonging to the large Omicron family, which is spreading extremely quickly in the United States, could soon become the majority there. Before gradually establishing itself in France, and therefore starting with its northern part? Caution…