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January 24, 2022 – Pfizer and Moderna COVID-19 booster vaccines appear to be very effective in preventing hospitalization due to the Omicron variant, according to three new CDC studies published on Friday.
The additional doses were 90% effective in keeping people out of the hospital after infection and 82% effective in preventing emergency department visits and emergency care.
“These reports add more evidence to the importance of keeping abreast of COVID vaccinations,” Rochelle Valenski, MD, director of the CDC, said Friday at a news briefing by the White House’s COVID-19 response team.
Data from Israel and other countries suggest that booster vaccines can prevent serious illness and hospitalization, but it is unclear whether additional doses would have the same effect in the United States. time of the waves Delta and Omicron.
In one study, researchers analyzed hospitalizations and visits to emergency departments and emergency clinics in 10 states between late August 2021 and early January 2022. The effectiveness of the Omicron hospitalization vaccine dropped to 57% for those who received your second dose more than 6 months earlier. A boost restored the defense to 90%.
In a second study, researchers analyzed nearly 10 million cases of COVID-19 and more than 117,000 deaths reported in 25 state and local health departments between April and December 2021. Cases and deaths were lower among people who received booster dose compared to those who have been fully vaccinated but have not been boosted. Cases and deaths are even lower among reinforced Americans than among those who have not been vaccinated.
In a third study published in JAMA, the journal of the American Medical Association, the researchers looked at data from more than 70,000 people who were tested for COVID-19. The third dose provides greater protection against infections with symptoms than two doses or no doses. Full vaccination and boosters protected less against the Omicron variant than against the Delta variant.
The CDC also released data Thursday showing that unvaccinated adults aged 65 and over who are infected with COVID-19 are 49 times more likely to be hospitalized than those who are vaccinated and have received booster vaccines. . At age 50 and older, unvaccinated adults are 45 times more likely to be hospitalized than those who are vaccinated and reinforced.
“There are still millions of people who qualify for a booster dose and have not yet received one,” Valenski said on Friday. “As we continue to face the Omicron variant, which accounts for over 99% of infections in the United States today, I urge everyone who qualifies to get a booster to get it as soon as possible.
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