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Experts have long concluded that two doses of Pfizer or Moderna or a dose of Johnson & Johnsonmay not be protective Enough forever, that's why the rapprochement shots are already tested. But when Pfizer said on July 8 that it would soon seek the authorization of the Food and Drug Administration (FDA) to giveBooster Shots in August, the ad caught everyone out of keep. The FDA and the disease control and prevention centers (CDC) have just released their own declaration on boosters, casting doubt on the Pfizer plan to deploy extra shots so quickly.

RELATED:If you had a vaccine, get a reminder now, the virus expert warns.

A few hours after the initial announcement of Pfizer, the FDA and CDC sent their joint statement saying that Americansno need for callback shots just now. "The Americans who have been completely vaccinated do not need a recall at the moment," said the July 8 statement. This means that more than 158 million people fully vaccinated in the United States do not need to start worrying aboutAdditional Covid Shots, with regard to these agencies

The FDA and the CDC added that they are "engaged in a rigorous science-based process to be determined whether or when a booster may be necessary". Although they take data from specific pharmaceutical companies, such as Pfizer, into account during their process, the agencies say they would not decide a recall timeline with these data alone.

"We continue to consider any new data as it becomes available and will keep the public informed," says the declaration. "We are prepared at doses of reminder if and when science demonstrates that they are needed."

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Pfizer and its Biontech partner stated that Israel's real-world health data show that the effectiveness of vaccines for symptomatic infection and disease decreases six months after initial vaccination - although efficiency From the prevention of severe covidant remains high.

"That's why we said, and we continue to believe that it is likely, based on the entire data we have to date, that a third dose may be necessary within 6 to 12 months following Total vaccination, "said manufacturers.

But the research remains in conflict on this and many experts are not convinced.Paul Offit, MD, director of the Philadelphia Children's Hospital Education Center, recently told business initiated to have thought it could be as long asthree to five years Before booster shots are needed. And a study of June 28 published in the newspaperNature says that those who were able to pfizer can neverneed a booster After finding evidence that two-dose vaccine regimes result in persistent long-term immunity.

"The United States is fortunate to have extremely effective vaccines that are widely available for people aged 12 and over. People who are fully vaccinated are protected from serious illness and death, including variants Currently circulating in the country as Delta ", the FDA and the CDC concluded, saying that non-vaccinated individuals are those who are mostly pressing risks to COVID.

RELATED:If you did this after your first shot, you are at risk of the delta variant.