Europe 1 with AFP 6:33 am, November 23, 2021

A booster of vaccine against Covid-19 for all adults can be considered because of the deterioration of the situation in France, believe the two advisory bodies created by the government on the occasion of the pandemic. This expansion of the recall could make it possible to "slow down the epidemic and reduce the number of serious forms".

A booster of vaccine against Covid-19 for all adults can be considered because of the deterioration of the situation in France, believe the two advisory bodies created by the government on the occasion of the pandemic.

According to the Scientific Council and the Vaccine Strategy Orientation Council (COSV), this expansion of the booster to all adults, six months after vaccination, could make it possible to "slow down the epidemic and reduce the number of serious forms".

"Restore vaccine efficacy" to "control the epidemic"

The COSV is the first to have put forward this idea in a notice dated Friday.

In a separate opinion dated Saturday and made public on Monday, the Scientific Council chaired by infectious disease specialist Jean-François Delfraissy also supports this hypothesis.

"To restore vaccine efficacy to levels allowing the control of the epidemic, the generalization of the booster dose to the entire adult population could be an effective approach", estimates the COSV chaired by the immunologist Alain Fischer .

In France, the booster dose (which is most often a third dose) currently only concerns people over 65 and people at risk of severe forms of the disease (as well as caregivers).

This dose will be required to extend their health pass from December 15.

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A booster dose offered to 50-64 year olds on December 1

On November 9, President Emmanuel Macron announced that the booster dose would be offered to 50-64 year olds from December 1, without even waiting for the opinion of the High Authority for Health (HAS) responsible for inspiring executive policy on these matters.

In its opinion, the Scientific Council pleads for the booster dose to become necessary to extend the health pass for 50-64 year olds, "under the same conditions" as for those over 65, "but with an appropriate time frame. ".

On Friday, the HAS recommended injecting the booster dose from the age of 40.

"The extension of the recall to under 50s will be studied soon," said Minister of Health Olivier Véran on Twitter.

Following the opinion of @HAS_sante, the vaccine booster against Covid will be open to people aged 50 and over from the beginning of December as announced by the President of the Republic.


The extension of the recall to under 50s will be studied shortly.

- Olivier Véran (@olivierveran) November 19, 2021

A decrease in vaccine effectiveness over time

The current acceleration of the epidemic, combined with the decline in vaccine effectiveness over time, is likely to lead to "a significant increase in the number of daily admissions to hospital and critical care", underlines the Council orientation of the vaccine strategy in its opinion.

"Even if the risk of serious forms remains much higher for non-vaccinated people (...), the absolute number of vaccinated people hospitalized in conventional care or in critical care is far from being negligible", he continues to justify the principle of a recall.