"CDC recommends everyone ages 6 months and older receive an updated 2024-2025 COVID-19 vaccine to protect against the potentially serious outcomes of COVID-19 this fall and winter whether or not they have ever previously been vaccinated with a COVID-19 vaccine," the agency said in a statement.
The COVID-19 vaccines now available, which are also broadly recommended, target the XBB.1.
Pooled effectiveness estimates from studies of the currently available vaccines, which target the XBB strain, and the last slate of shots, which were bivalent, found that effectiveness against hospitalization due to COVID-19 was below 50 percent, the original threshold laid out by regulators.
Researchers with the CDC and other institutions have also found the protection wanes over time, one reason U.S. officials have turned the COVID-19 vaccine model into a once-a-year update similar to the influenza vaccination program.
Many Americans took the original COVID-19 vaccines but most have opted against receiving the newer shots.
As of May 11, just 14.4 percent of children and 22.5 percent of adults have received one of the currently available COVID-19 vaccines, according to CDC surveys, which also found that many doctors have stopped recommending the shots because they're focused on promoting other vaccines and worry recommending COVID-19 vaccination could increase hesitancy among patients to receiving the other vaccines.
The CDC estimated that up to 116,000 hospitalizations from COVID-19 will be prevented over the next year with universal vaccine recommendations, assuming an initial 75 percent effectiveness against hospitalization.
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