The rapid growth of the more transmissible BA.2 variant of Covid-19 is continuing in Los Angeles County. As of March 12, the latest date for which data is available, 32% of local positive Covid tests that underwent laboratory sequencing turned out to be the result of BA.2.
During the week ending March 5, 16.7% of sequenced cases were found to be BA.2, meaning that the variant’s share of new cases very nearly doubled in just 7 days.
The final week of February, BA.2 accounted for 6.3% of new cases, which means that the variant’s share of infections more than doubled the week before, also.
Given the continued rapid spread of BA.2 in other regions where it took root earlier — such as the U.K., South Africa, Singapore, India and the Northeast United States — it’s likely that in the 2 weeks since the newest numbers were tallied it has become dominant in L.A., as well.
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