The flu vaccine was more than 40% effective in preventing adults from getting sick enough from the flu that they had to go to a doctor’s office, clinic or hospital, health officials said.
One reason is the vaccine was a good match against the strains that spread over the fall and winter, officials say.
Annual flu vaccines are recommended for everyone 6 months and older in the U.S. About half of eligible kids and just under half of adults got flu shots in the last several months, according to CDC data. Vaccination rates were up compared with 2021-2022, but below what they were before the COVID-19 pandemic hit in 2020, said the CDC’s Brendan Flannery.
The dominant flu strain was the kind typically associated with higher rates of hospitalizations and deaths, particularly among older people. In some years, the vaccines were virtually ineffective against that strain in people 65 and older. But this season’s vaccine has done unusually well, with the best results seen in at least 10 years, said Flannery, who is responsible for the CDC’s flu vaccine effectiveness data.
It’s not clear exactly why the wave crested so early, but flu seasons have been unusually mild or otherwise strange since the COVID-19 pandemic hit in early 2020, Flannery said. CDC officials also caution that flu season might not really be over — late winter or spring second surges have occurred in the past.
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