Israel began giving the extra shots in late December, but Pfizer CEO Albert Bourla said Monday it was still too early to know if they were necessary.
A woman gets a dose of the Pfizer-BioNTech Covid-19 vaccine in Santiago, Chile.
The images are from the same source.
Everyone over the age of 55 will be given extra vaccine shots in February, with the fourth vaccine shot being given to the immunocompromised residents.
The country had originally planned to start the shots in February, but moved it up because of cases in other countries.
Bourla said he didn't know about the fourth shots.
It is still something that needs to be tested, if there is a need for it.
Bourla said Monday that Pfizer will release an updated version of its vaccine in March.
The CEO said at the conference that it would be better to give an extra dose of the vaccine than a fourth shot.
Stephane Bancel, CEO of Moderna, predicted last week another vaccine dose may be necessary in the fall, saying the initial booster shots are not going to hold great.
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Little data has come out so far about the effectiveness of fourth shots. Professor Gili Regev-Yochay, director of the infectious diseases unit at Sheba Medical Center in Israel, told Ynet that the extra dose increased the amount of Covid-19 in the body by five times. The second booster shot does not have the same effect as the first.
Will the U.S. distribute fourth vaccine doses? West Virginia became the first state to formally request permission from the federal government to start administering extra booster doses due to Israel's fourth dose roll out and the state's large vulnerable population. The CDC is monitoring data on the fourth shot, but Dr. Rochelle Walensky believes the agency should maximize the protection of the tens of millions of people who still have it.
There is a structure called the Tangent.
Americans who have been diagnosed with an immune deficiency will be eligible for a fourth vaccine dose later this week. The CDC recommends an extra dose of the Pfizer/BioNTech or Moderna vaccine for immunocompromised groups at least five months after taking their third shot. This is different from the second booster shots that some countries are giving to people without compromised immune systems. The CDC considers a third dose for the immunocompromised to be part of their initial vaccine series, rather than a booster shot.
The key background.
There is a growing concern about the necessity of fourth vaccine doses. The initial booster shots provide substantial protection from Covid-19 over the primary vaccine series, though breakthrough infections are still possible, and the vaccines remain highly protective against severe illness and death. The U.K.'s Health Security Agency found that the booster shot is less effective at preventing infections within 10 weeks. At the end of December, Israel began administering fourth doses to the immunocompromised, and then expanded its coverage to everyone over the age of 60 in January.
There was aContra.
The initial booster shots are enough to prevent severe illness and hospitalization, according to the U.K. government.
Will the states offer the 4th covid vaccine? West Virginia is the first state to ask the CDC for permission.
The fourth vaccine dose starts in chile.
The vaccine will be ready in March.
Some experts say that Israel is considering a fourth vaccine dose.
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