A new study from the U.S. Centers for Disease Control and Prevention found that most adults who haven’t had an up-to-date health check COVID-19 Those who received the booster vaccine had “relatively less residual protection” against hospitalization than those who had not been vaccinated.
of study It turns out that the majority of Americans have not received the latest booster dose, and that their last dose was probably more than a year ago.
“The results of this analysis indicate that these adults may have relatively little remaining protection against COVID-19-related hospitalization compared to unvaccinated individuals. But there may still be more protection against serious illness,” the researchers said in a study released Thursday.
An updated shot targeting not only the original COVID-19 strain, but also a specific Omicron submutant was first published. Licensed Announced for specific age groups by the Food and Drug Administration in August 2022.
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Uptake rates for renewed shots are far lower than experts expected, with just 20% of U.S. adults seeking renewed boosters as of May 10.
Defense power from updated shots followed a similar downward trend to shots that preceded it, according to a new study.
The study found that the efficacy of the bivalent vaccine for adult hospitalization was 62% by 3 months after administration. However, 6 months after vaccination, the rate of protection against hospitalization drops to 24% compared with unvaccinated adults.
The study found that the updated shots provided lasting protection against “critical illness” (defined as admission to the intensive care unit, death, or both). Vaccine efficacy against severe illness was 69% up to 3 months and 50% up to 6 months after vaccination.
“In this bivalent durability study, [vaccine effectiveness], the bivalent dose helped provide protection against hospitalization and severe illness associated with COVID-19,” the researchers wrote in their study. “Although some groups were clearly less protective, [vaccine effectiveness] Severe illnesses are more persistent, indicating that vaccines continue to help protect adults from the most severe COVID-19 outcomes. ”
FDA last month Licensed Updated with additional booster shots for older Americans and those with compromised immune systems. Federal officials are considering: Fall Booster Campaign For most other Americans.