Today, the more-infectious Omicron BA.5 subvariant is officially the dominant Covid strain in the U.S. Up until how, BA.5 has been tied to its sister Omicron subvariant, BA.4, as both had steadily outcompeted BA.2.12.1 — which itself had been driving cases for the past month or so.After the original Omicron variant appeared on U.S.
shores late last year and caused the deadliest wave of the pandemic, a succession of Omicron subvariants have come and gone: BA.1.1, BA.2, BA.2.12.1 and now BA.4 and BA.5.BA.5 was first identified in South Africa on February 26.
Less than a month ago, on June 4, it only accounted for 9.6% of cases in the U.S., while predecessor BA.2.12.1 sat atop the heap at 62%.
Today, the CDC estimates the subvarient is responsible for about 54% of new cases here. That’s double BA.2.12.1, which now accounts for 27% of infections.
Read more on deadline.com
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