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Covid-19: in the United States, the Moderna vaccine booster will only be done with half a dose

2021-10-20T22:04:37.233Z

The European Medicines Agency is due to comment on the data concerning this messenger RNA vaccine at the end of October. By measure of precauti



Only half, as a precaution.

This Wednesday, the United States Medicines Agency (FDA) ruled on the booster doses of the Covid-19 Spikevax vaccine, developed by Moderna, one month after the authorization of the Pfizer vaccine booster.

Americans over 65 or at high risk of developing severe forms of Covid-19 will be able to receive a new injection, but only with a half-dose, the FDA said in a statement.

According to the manufacturer, injecting half of a dose six months after completing a full vaccination schedule would minimize the risk of side effects, while maintaining satisfactory efficacy against severe forms of Covid-19.

In France, no Moderna recall until further notice

Since October 15, the French government has temporarily stopped booster injections with this messenger RNA vaccine, due to a greater risk of developing side effects than with a third dose of the Pfizer vaccine.

The French health authorities are based on a study having "established that men injected with the Moderna vaccine and aged less than 30 years had a slightly increased risk of developing inflammation of the myocardium".

The FDA is therefore also taking its precautions, even if these side effects remain very infrequent.

According to a note from the Directorate-General for Health, the European Medicines Agency must decide at the end of October on the validity of the data provided by Moderna, with a view to adopting the same strategy in Europe.

The FDA has also cleared Johnson & Johnson vaccine recalls for all people 18 and over.

This vaccine is considered to be relatively less effective than messenger RNA vaccines if injected as a single dose.

Finally, the FDA also authorizes the realization of a third dose with any authorized vaccine against Covid-19, even if it is different from the vaccine received in the first place.

Source: leparis

All life articles on 2021-10-20

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