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Is a fourth dose of the covid-19 vaccine needed?

2021-12-24T18:14:18.295Z


As COVID-19 cases continue to rise and the omicron variant spreads across the world, some nations are applying fourth doses of the vaccine.


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(CNN) -

As COVID-19 cases continue to rise and the omicron variant spreads across the world, some nations are applying fourth doses of the coronavirus vaccine to the most vulnerable people.


Israel's Prime Minister Naftali Bennett's office announced this week that adults 60 and older, medical workers and people with weakened immune systems could receive a fourth dose if at least four months have passed since their third dose.

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On Thursday, German Health Minister Karl Lauterbach said a fourth dose will be needed to maintain protection against the omicron variant, although the country has not yet started a fourth dose application launch.

Meanwhile, in the United States, it is too early to discuss a possible fourth dose of the coronavirus vaccine for most people, Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, said Wednesday.

"I think it's too early to talk about a fourth dose," Fauci told Michael Wallace and Steve Scott of WCBS Newsradio 880.

"One of the things that we are going to follow very carefully is what is the durability of protection after the third dose of an mRNA vaccine," Fauci said.

Moderna and Pfizer / BioNTech are mRNA vaccines.

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"If the protection is much longer lasting than the two-dose group without booster, then we can go a significant period of time without requiring a fourth dose," Fauci said.

"So I think it's premature, at least for the United States, to talk about a fourth dose."

Once the data on the fourth doses is available, the US Centers for Disease Control and Prevention will examine and consider whether they might be needed at the national level, but for now, the third doses appear to provide "protection. lasting, "CDC Director Dr. Rochelle Walensky told CNN's John Berman on Tuesday.

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"If there is science and when there is science that shows that that is necessary, we will certainly review it," Walensky said.

"Right now, we are working to make sure our vaccinated people get a booster," he said.

"We have a lot of vaccines where two shots, a primary series, and a booster provide long-lasting protection. So, while I think it's an important question to evaluate, it is very possible that we will have some additional protection with this booster shot. ".

Even some vaccine manufacturers have recognized that more time is needed to determine if, or when, a fourth dose might be needed in the United States, and how quickly protection might wane after a third dose.

"We'll have to wait a couple of months yet until we can see that data develop and mature to understand when to give that extra booster dose, if needed," Paul Burton, Moderna's chief medical officer, told Wolf Blitzer of CNN on Thursday.

However, Burton said he did not want to downplay the importance of boosters at this time and that people can be confident that "getting a booster shot will provide protection during the Christmas season and during these winter months."

Moderna announced Monday that preliminary data suggests her half-dose booster dose increased levels of antibodies against the Omicron variant compared to levels seen when a fully vaccinated person has not received a booster.

Immunosuppressed People May Need a Fourth Dose of Covid-19 Vaccine, CDC Says

(CNN) - People with certain health conditions that cause them to be moderately or severely immunosuppressed may need a fourth dose of a covid-19 mRNA vaccine, according to the United States Centers for Disease Control and Prevention. United States (CDC).

The CDC authorized a third dose for certain immunosuppressed people 18 years of age and older in August.

Research showed that a booster dose improved the antibody response in some people under these conditions.

In October, the CDC approved the booster doses for a broader range of the population.

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In the case of the immunosuppressed, the CDC says they could receive a booster dose - which would be a fourth injection - at least six months after the third dose of an mRNA vaccine has been given.

People who are moderately or severely immunosuppressed include those on active treatment for leukemia or cancer tumors, certain organ and stem cell transplant recipients, people with advanced or untreated HIV, and those taking a high dose corticosteroids or other medicines that can suppress your immune system.

Immunosuppressed people who received the Johnson & Johnson single-dose vaccine should get a booster at least two months after the initial vaccination.

People who choose the Moderna vaccine as a booster, even if they received a different vaccine as the first dose, should receive the half-dose authorized as a booster for the Moderna vaccine, the CDC said.

Source: cnnespanol

All news articles on 2021-12-24

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