Los Angeles Times

Early signs of rising COVID in California as new FLiRT subvariants dominate

Travelers receive boarding passes and check in baggage at the Delta Airlines terminal at Los Angeles International Airport on May 23, 2024.

LOS ANGELES — California may be headed to an earlier-than-normal start to the summer COVID-19 season, with coronavirus concentrations in sewage rising in some areas along with the statewide positive-test rate.

The trend comes as the latest family of coronavirus subvariants, collectively nicknamed FLiRT, have made significant gains nationally.

The FLiRT subvariants — officially known as KP.2, KP.3 and KP.1.1 — have overtaken the dominant winter strain, JN.1. For the two-week period that began May 12, they were estimated to account for a combined 50.4% of the nation's coronavirus infections, up from 20% a month earlier.

Instead of California seeing reduced circulation of COVID-19, as occurred earlier this spring, state health officials said that they estimate the spread is now either stable or slowly increasing.

"COVID-19 concentrations in wastewater have suggested increases in several regions across California since early May. Test positivity for COVID-19 has been slowly increasing since May," the state Department of Public Health said in a statement to The Times on Friday.

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