For the seven-day period that ended Sunday, there were an average of 121 new cases per day in L.A. County, up from 106 a day the prior week.
The new FLiRT subvariants, officially known as KP.3, KP.2, and KP.1.1, are believed to be roughly 20% more transmissible than their parent, JN.1, the winter's dominant subvariant.
For the two-week period that ended June 8, 55% of estimated COVID specimens in the U.S. were of the FLiRT variants - up from 28.6% a month earlier.
L.A. County's uptick in cases and hospitalizations likely represents an earlier-than-normal start of the COVID wave, which has occurred every summer since the pandemic began.
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