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Friday, May 27, 2022

Third booster shot from Omicron effective against severe disease, CDC study shows

NEW YORK (AP) – Three studies released Friday offered further evidence that the vaccine for COVID-19 stands for the Omicron variant, at least in people who have received booster shots.

Health officials said they are the first large US study to look at safety from a vaccine against Omicron.

The papers echo previous research – including studies in Germany, South Africa and the UK – showing that available vaccines are less effective against Omicron than older versions of the coronavirus, but also that booster doses can help fight the virus. Modifies antibodies to increase the chance of symptomatic survival. Infection.

The first study looked at hospitalizations and emergency room and urgent care center visits in 10 states from August to this month.

It found that vaccine effectiveness was best after three doses of Pfizer or Moderna Vaccines in preventing emergency department and urgent care visits associated with COVID-19. Security fell from 94% during the Delta wave to 82% during the Omicron wave. Protection from only two doses was low, especially if six months had passed since the second dose.

Officials have emphasized the goal of preventing not only infection but also serious disease. On that count, some good news: During the Delta and Omicron periods, a third dose was at least 90% effective at preventing hospitalizations for COVID-19, the study also found.

Patients wait to receive a COVID-19 vaccine booster shot at a mobile vaccination station on 59th Street below Central Park on December 2, 2021 in New York (AP Photo/John Minchillo)

The second study focused on COVID-19 case and death rates in 25 states from early April to Christmas. Those who were boosted had the highest protection against coronavirus infection, both at the time Delta was headed and while taking Omicron.

Those two articles were published online by the Centers for Disease Control and Prevention.

The Journal of the American Medical Association published the third study led by CDC researchers. It saw people testing positive for COVID-19 at more than 4,600 testing sites across the US from December 10 to January 1.

Three shots of Pfizer and Moderna Vaccines were about 67% effective against Omicron-related symptomatic disease compared with unvaccinated people. The researchers found that the two doses, however, did not provide any significant protection against Omicron when measured several months after the completion of the original series.

“It really shows the importance of getting a booster dose,” said Emma Accorsi of the CDC, one of the study’s authors.

Americans should get a booster if at least five months have passed since they completed their Pfizer or Moderna series, but millions of people who are eligible haven’t.

“If you’re eligible for a booster and you haven’t received it, you’re not up to date and need to get your booster,” CDC Director Dr. Rochelle Valensky said during a White House briefing Friday.

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Third booster shot from Omicron effective against severe disease, CDC study shows

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