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The third dose vaccination campaign against Covid-19 is not yet over, but the government is already paving the way for the fourth dose. Jean Castex said Thursday, January 6, to wait for the green light from the health authorities. Marina Carrère d’Encausse, doctor, brings her expertise to the 19/20 set.
Will a fourth dose of vaccine against Covid-19 be necessary in France? “We have the experience of a study by a British health agency, which followed people who had their three doses. The efficacy is observed, since the efficacy goes back to 70% after the booster dose on the symptomatic forms linked to the Omicron variant.“, introduced the doctor and host Marina Carrère d’Encausse, present Thursday, January 6 on the 19/20 plateau. On the other hand, the effectiveness drops five to nine weeks after the booster to 60%, then below 50% after 10 weeks .
In view of previous experiences, scientists nevertheless believe that the protection will be more durable in severe forms. Marina Carrère d’Encausse finally recalls that he “it is not just antibodies in the protection “. The B and T lymphocytes, which keep the virus in memory, can indeed attack it if it comes back.