Since the end of August, the administration of a vaccination booster, sometimes incorrectly called "third dose", has been recommended in France for people over 65 years of age and to certain people whose state of health makes them more vulnerable to severe forms. of Covid-19.
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The campaign officially began in mid-September, with the suggestion to combine the injection of a dose of Pfizer-BionTech or Moderna with the flu shot.
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Countries that have launched their vaccination campaign early have a fairly close schedule and targets: Israel authorized the boosts at the end of July, Germany and Great Britain are due to start in September, followed by the United States.
These strategies were designed by observing the loss of vaccine efficacy “in real life”.
More than nine months after the first vaccinations in Israel, the United States or the United Kingdom, the results coming back from the field confirm that the protection decreases over time, especially in the elderly and those suffering from pain.
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