EMA warns booster shots may over-saturate immune system | Top stories

EMA warns booster shots may over-saturate immune system

The EMA warns that booster shots can over-saturate the immune system. Image: Pixabay

Booster vaccines can potentially over-saturate immune system, EMA warns

Marco Cavalieri, head of strategy for biological health threats and vaccines at the European Medicines Agency (EMA), has expressed doubts about the need to give booster doses of the Covid vaccine. He expressed concern that too many doses would have a negative effect on the body’s immune system.

Speaking at a press conference on Tuesday, January 11, Mr. Cavalieri stressed that the EMA observes with “concern” the current vaccination strategy which consists of vaccinating citizens every three or four months, at the exception of the immunocompromised.

“We must be careful not to over-saturate the immune system with repeated vaccinations,” he warned, noting that there is also the risk of generating “fatigue” in the population.

He explained, “We haven’t seen data on a fourth dose yet, and we would like to see that data before we can make any recommendations, but at the same time, we’re quite concerned about a strategy that involves repeated vaccination at. short term. term”.

A third dose has already been administered, “due to the current epidemiological situation”, but Cavalieri stressed that the vaccination cannot be repeated “continuously”. His proposal was: “It would be better to start thinking about booster doses more spaced in time and synchronized with winter, as we do with the flu.”

Cavalieri has also ruled out for the moment the idea that Covid-19 can be treated like an influenza virus. “It is moving towards an epidemic, even if it has not yet reached this status. With the Omicron there will be more natural immunity, in addition to the vaccination, so that it will move more quickly towards an epidemic scenario “, he stressed.

He also pointed out that the Omicron strain is “very contagious, so the number of people infected is high. It is important to be aware of its potential burden and not to view it as a mild illness ”.

The current vaccines “offer high protection against serious illnesses and hospitalizations linked to Omicron,” he said. “Data from South Africa shows that people who received 2 doses have up to 70% protection. UK data shows that although protection decreases a few months after vaccination, it increases again to 90 percent after the booster dose, ”Cavalieri concluded, as reported.


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Gérard Truchon

An experienced journalist in internal and global political affairs, she tackles political issues from all sides

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