Why are the Omicron variants of the Corona virus increasing? | science | In-depth reports on science and technology | DW

The SARS-CoV-2 coronavirus is quite versatile, with a large number of variants and sub-variables. The omicron variant alone contains more than 130 sub-chains. In Europe, omicron BA.4 and BA.5 sub-variants are currently on the rise. Why are they spreading so quickly despite the fact that so many people have already been vaccinated? Omicron is better …

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