‘Hard to explain’: Scientists struggle to figure out plunging COVID cases

Scientists are struggling to explain the major, ongoing drop in Covid cases nationwide, with experts pointing to a variety of explanations including possible herd immunity, compliance with mitigation orders and rising vaccination rates as possible causes.

The ultimate explanation for the plunge in cases will likely take months if not years to fully explain, though Cook from the University of Florida said the natural ebb and flow of the virus — what epidemiologists call “seasonality” — might be a factor.



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