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U.S. studies highlight the need for COVID boosters to fight Omicron

Stock MarketsJan 21, 2022 04:41PM ET
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2/2 © Reuters. FILE PHOTO: A worker from Chicago Family Health Center prepares a booster shot for the coronavirus disease (COVID-19) at a McDonald's, as the Omicron coronavirus variant spreads through the country, in Chicago, Illinois, U.S., December 21, 2021. REUTERS/J 2/2

By Julie Steenhuysen

CHICAGO (Reuters) - Three U.S. studies show that a third dose of an mRNA vaccine is key to fighting the Omicron coronavirus variant, providing 90% protection against hospitalization due to COVID-19, the U.S. Centers for Disease Control and Prevention (CDC) said on Friday.

The studies, led by the CDC, are among the first in the United States to look at the impact of booster doses against the fast-spreading Omicron variant, which now accounts for 99% of all new COVID cases.

Overall, they suggest that boosters helped protect against both infection and symptomatic disease. Adults aged 50 and older saw the most benefit from an extra dose of the vaccines made by BioNTech SE (NASDAQ:BNTX) with Pfizer Inc (NYSE:PFE) or Moderna (NASDAQ:MRNA) Inc.

"Protection against infection and hospitalization with the Omicron variant is highest for those who are up to date with their vaccination, meaning those who are boosted when they are eligible," CDC Director Dr. Rochelle Walensky said in a White House briefing on Friday.

As has been shown in other countries, vaccine boosters performed better against the Delta variant than Omicron, a highly mutated version of the SARS-CoV-2 virus that has been able to evade immunity from vaccines and prior infections.

One of the studies, published on Friday https://www.cdc.gov/mmwr/volumes/71/wr/mm7104e3.htm?s_cid=mm7104e3_w in the CDC's Morbidity and Mortality Weekly Report, looked at rates of hospitalization, emergency department and urgent care visits in 10 states between Aug. 26, 2021, and Jan. 5, 2022.

It found that protection from two doses of vaccine fell to 57% in people who got their second shot at least six months earlier. Among those who received a booster, protection from hospitalization and urgent care visits was 90%.

In another study https://jamanetwork.com/journals/jama/fullarticle/2788485#:~:text=Conclusions%20and%20Relevance%20Among%20individuals,compared%20with%20test-negative%20controls published in the JAMA medical journal, researchers reviewed data on 23,391 COVID-19 cases caused by either the Delta or Omicron variant among people seeking testing between Dec. 10, 2021, and Jan. 1, 2022.

They found that among people seeking testing for COVID-like symptoms, those who had received three doses of an mRNA vaccine had the highest protection from infection compared with those who got two doses or were unvaccinated.

Because of the timing of U.S. booster recommendations, most people in the study had been vaccinated within a month of seeking testing, which likely contributed to the benefit.

Data from the UK has shown that the increased antibody protection gained from boosters wanes after 10 months, so it is unclear how long that benefit would hold.

Some countries have already started offering additional booster doses, but a recent study https://www.reuters.com/world/middle-east/israeli-study-shows-4th-shot-covid-19-vaccine-not-able-block-omicron-2022-01-17 from Israel showed that while a fourth dose of an mRNA vaccine boosted antibodies, the level was not high enough to prevent infection by the Omicron variant.

Early enthusiasm for boosters in the United States has been lackluster, fueled in part by rapidly shifting public health messaging and concerns among some experts over a lack of U.S. data demonstrating their benefit.

There is also the misguided perception among some Americans that if you can still get infected, why bother with a booster?

According to the CDC, only 82.5 million, or 39.3%, of fully vaccinated Americans have received a COVID-19 booster dose.

U.S. studies highlight the need for COVID boosters to fight Omicron
 

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Comments (8)
Red Riley
Red Riley Jan 22, 2022 7:13PM ET
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wore a mask got covid, wore a mask got vaxed got covid, wore a mask got vaxed got booster got covid. please admit it. you know nothing.
Dusty Owen
Dusty Owen Jan 21, 2022 7:18PM ET
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Uk study showed negative vaccine efficacy after 20 weeks. The boosters drops to below 30% efficacy within a matter of weeks. They are close to worthless. Youre better off wating for a vax for a dominant strain than getting a booster.
Todd Gray
Todd Gray Jan 21, 2022 6:51PM ET
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Obviously a doctored study, Doctor. Great Britain & Norway gave up spam-mandates because they can't contain it, and it's really not that bad. But, science just wants more money. Funny how over history the self proclaiming smart liberals always go way to far, and then are blown back & despised for decades. This is the 3rd time they've done this in the US. Always ends the same.To bad the smart people, aren't as smart as they think. If they were, we'd be a stable country with easily managed internal bumps.
Kelly Mayer
Kelly Mayer Jan 21, 2022 5:36PM ET
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4x vaxed in Israel all getting Omicron. Just bypasses vaccines. Propaganda .
Brian Edwards
Brian Edwards Jan 21, 2022 4:50PM ET
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Just like the "studies" that said the original shots were effective and would prevent you from getting and spreading COVID and that masks work.
John Laurens
John Laurens Jan 21, 2022 4:49PM ET
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Complete joke. US is finished with the wuhan. Only the fascist dems are holding onto their dream..
James Hilliard
James Hilliard Jan 21, 2022 4:35PM ET
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lol. 99% is impossible. this is a farce.
wasloslolkiyekA wasloslolkiyekA
wasloslolkiyekA wasloslolkiyekA Jan 21, 2022 4:23PM ET
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The bureaucrats have just one song: vaccine and nothing but. Omicron is the gentlest variation yet, as is normal in pandemic virus progression, so it can serve as it's own booster. However, pharmas and gov'ts gain no money nor control with natural immunity. Why still so little interest in treatments? Have they proved the origin, yet? When is the next one?
 
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