Use towards recommendation third dose of vaccine after eight months

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August 17, 2021 - The Biden administration will announce that a third dose of Covid vaccine is needed for virtually all Americans to counter weakened immunity and the Delta variant. According to sources cited by the Washington Post, federal health authorities believe that a booster is needed eight months after full vaccination.   

Experts would recommend the booster eight months after the first two doses and would suggest that the first to receive it should be healthcare workers, the elderly, and nursing home residents.

The official announcement should arrive within this week - according to some as early as tomorrow - and the start of vaccinations with the third dose will not begin before the middle, if not the end of September, after the expected authorization by the Food and Drug. Administration. The conclusion on the need for the recall was reached after an intense discussion between the heads of the administration's anti-Covid team, which analyzed data from the US and other countries on the effectiveness of a third dose. 

The secretary for the fight against Covid-19 of the Brazilian Ministry of Health, Rosana Melo, said that the ministry is evaluating the possibility of administering a third dose of the vaccine in patients with low immunity, following an example of what is happening in the United States. mainly due to the expansion of the Delta variant. "We have some preliminary studies, but these studies have not been published," Melo specified during a meeting of the Temporary Commission of Covid-19 at the Senate. During the hearing, the Sergio Arouca School of Public Health researcher Margareth Dalcomo acknowledged that some groups, such as the elderly, people with disabilities and health care workers, may need to be strengthened. "We had stopped admitting elderly patients and went back to admitting them. The vast majority have been vaccinated with CoronaVac, "said Margareth, raising doubts about the poor efficacy of the Chinese vaccine. Meanwhile, elderly residents of Paqueta Island, off Rio de Janeiro, are already receiving the third dose of the vaccine as part of a study conducted by the Fiocruz Institute.

For us "it is conceivable that the third doses will take place between October and November". This is the prediction of the virologist Fabrizio Pregliasco, professor at the State University of Milan while awaiting the official announcement of the Biden administration which seems to be oriented towards the green light of the recall for all Americans starting from September. "Obviously it is a destiny - says Pregliasco - it must be evaluated in view of the presence of the virus. All of them. Then in the near future, if we work well now - he explains - we may not be able to foresee a recall every year in the next few years ". So no more a third dose just for the elderly and frail? "It depends on the epidemiological situation, if the cases are few - the virologist explains - you can risk having people less protected, at this stage no ".