As many are vaccinated and a significant portion are determined not to be, the virus is taking every opportunity to morph. Dreams of COVID-19’s mayhem ending any time soon look unrealistic, see Delta Seen to Push Herd Immunity Threshold above 90%.
The spread of the delta coronavirus variant has pushed the threshold for herd immunity to well over 80% and potentially approaching 90%, according to an Infectious Diseases Society of America briefing on Tuesday.
That represents a “much higher” bar than previous estimates of 60% to 70%, because delta is twice as transmissible, said Ricardo Franco, an assistant professor at the University of Alabama at Birmingham.
“It is becoming clear that this is a very dangerous, way more dangerous virus than the original one,” Franco said.
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