A summertime wave of
COVID-19 infections is arriving earlier than last year across a growing share of the country, federal data suggests, as a new variant called LB.1 could be on track to become the latest dominant strain of the virus.
For the first time in months, the CDC
estimates that no states or territories are seeing COVID-19 infections slow this past week. Key virus indicators appear to be worsening fastest across a number of western states, where trends first began climbing this month.
Levels of virus
detections in wastewater from the western region, often an early signal of rising COVID-19 cases, are already near the threshold the Centers for Disease Control and Prevention deems to be "high" levels of infection risk. Nursing home COVID-19 cases had also accelerated in
recent weeks from this region.
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The rise of LB.1 and KP.3 variants
COVID-19 cases are picking up at the same time that the CDC says it is tracking two new variants
growing in proportion nationwide. Scientists call them KP.3 and LB.1.
KP.3 has reached roughly a third of cases nationwide, up from
25% two weeks ago, and LB.1 makes up 17.5% of cases, as of the CDC's "Nowcast"
projections published Friday.
Both are displacing a close relative, a so-called
"FLiRT" variant called KP.2, which had risen to dominance last month. The CDC's projections so far have LB.1 starting to grow at a faster rate than KP.3, suggesting LB.1 might overtake KP.3.
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Since the FDA's meeting [about which variants to target with the next batch of vaccines], the CDC has begun to track KP.3 and LB.1's rise to overtake KP.2.
COVID summer wave grows, especially in West, with new variant LB.1 on the rise (CBS News, June 21, 2024)