BA.5 Omicron Is Winning The Covid Variant Battle In The U.S., Especially In The Southwest
07.06.2022 - 22:51
/ deadline.com
The BA.5 Omicron variant, first identified in South Africa on February 26, now seems to have an edge in the competition for dominance across the United States.
Three Covid variants are currently on the rise as the country experiences a summer surge in cases. All are members of the Omicron family. While BA.5 still only accounts for 7.6% of cases in the country, according to data released by the Centers for Disease Control and Prevention today it is clearly making bigger week-by-week gains than any other variant. Similar trends have repeatedly led to other Omicron strains becoming dominant in the U.S.
The current dominant variant BA.2.12.1, which only achieved that status two weeks ago, currently accounts for 62.2% of new positive cases in the U.S. where a variant was identified.
Last week, BA.2.12.1 accounted for 59% of variants identified. That’s a 5.4% rise in the past week. The week before BA.2.12.1 saw a roughly 7% increase overall.
But BA.5 rose from 4.2% to 7.6% in the past week, an 85% rise in the past week. That’s even more than the 74% increase the South African variant saw the week before, an acceleration.
Sister lineage BA.4, first identified in South Africa in January, rose from 3.3% to 5.4% of all variants sequenced in the past week. That’s a considerable 64% increase, but not on par with BA.5. See chart below.
The South African variants have increased their shares even more rapidly in the Southwest, specifically in Texas and New Mexico, where together the already account for close of one-quarter of all new cases, at 22.2%. See map below.
In those two states, BA.5 was identified in 13.2% of new cases analyzed for variants this week. That’s at 71% rise from the 7.7% share BA.5 held just last week. Compare that to