It makes up nearly 86% of COVID cases reported to the WHO.
stated “the relative proportion of BA.2 has increased steadily since the end of 2021, with BA.2 becoming the dominant lineage by week seven of 2022.” Over the last month, BA.2 has made up 85.96% of COVID-19 cases reported to the WHO.
The subvariant is most dominant in Southeast Asia, followed by the Eastern Mediterranean, African, Western Pacific, and European regions. The WHO also confirmed that BA.2 is currently dominant in the Americas., as of March 19, BA.2 was estimated to make up 34.9% of COVID-19 cases in the U.S., while BA.1 made up 57.3%. Prior to the dominance of BA.2, BA.1 was the most contagious variant of SARS-CoV-2. Now, BA.2 is thought to be about 30% more transmissible than BA.
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