The CDC reports an increase in COVID-19 cases across 25 states, indicating the summer wave has begun. National COVID-19 activity remains low despite rising wastewater data. Significant emergency room rates have increased in the Pacific Northwest and Southeast, marking the highest levels since earlier in the year. The CDC's analysis suggests recurring biannual peaks for COVID-19, linked to genetic variations in the virus's spike protein. Additionally, health officials are also observing an unusual rise in parvovirus B19, which can cause flu-like symptoms in some individuals.
"Our analysis revealed biannual COVID-19 peaks in late summer and winter, a pattern that is expected to persist as long as the rapid evolution of SARS-CoV-2 and cyclical S1 diversity continues."
"Health officials have been watching for an increase in COVID-19 this summer, as new variants have spread to the U.S. after fueling surges overseas."
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