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Nearly 60% of Americans have received at least one dose of a coronavirus vaccine
The spread of the delta coronavirus variant has pushed the herd immunity threshold to over 80% and potentially nearly 90%, according to a briefing from the Infectious Diseases Society of America on Tuesday.
This represents a bar “much higher” than previous estimates of 60% to 70% because the delta is twice as transmissible, said Richard Franco, assistant professor at the University of Alabama at Birmingham.
“It is becoming clear that this is a very dangerous virus, much more dangerous than the original,” Franco said.
Collective immunity is based on the idea that when a certain percentage of the population has been vaccinated against the virus or acquires immunity from a previous infection, it helps protect the population as a whole and reduce transmission.
Nearly 60% of Americans have received at least one dose of a coronavirus vaccine, and about 50% have been fully vaccinated, which represents about 165 million individuals, according to CDC data. Meanwhile, some 35 million people in the United States have tested positive for the virus during the pandemic.
(Except for the title, this story was not edited by NDTV staff and is posted from a syndicated feed.)
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