The fast-changing coronavirus has kicked off summer in the U.S. with lots of infections but relatively few deaths compared to its prior incarnations.
“And that’s because we’re now at a point that everyone’s immune system has seen either the virus or the vaccine two or three times by now,” said Dr. David Dowdy, an infectious disease epidemiologist at Johns Hopkins Bloomberg School of Public Health. “Over time, the body learns not to overreact when it sees this virus.”As many as 8 out of 10 people in the U.S. have been infected at least once, according to one influential model.
Now, Aspinall said, the built-up immunity has driven down the death rate to solidly in the range of a typical flu season. Over the past decade, the death rate for flu was about 5% to 13% of those hospitalized. “We thought we understood it until these new subvariants emerged,” said Dr. Peter Hotez, an infectious disease specialist at the Baylor College of Medicine in Texas.
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