BA.2 has overtaken the original omicron version of the coronavirus that quickly dominated the world this winter
amid relaxed safety protocols in the same way that delta hit last summer when many thought the coronavirus was finished.
Evidence is not clear on whether BA.2 causes more severe disease, but vaccine makers have said the protection extends to BA.2. Experts have said they believe infection from omicron provides some level of immunity against BA.2. The charts below show the mix of coronavirus variants in a selection of countries that currently have high levels of. To capture the latest trends, this map uses three-week periods, with the most recent ending last Saturday. In any country, the genomic sequences may be concentrated within a particular outbreak, or may miss some outbreaks, so it is not necessarily representative of the country as a whole.
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