The variants pose a serious threat against which immediate action must be taken: this is the observation made by the Haute Autorité de Santé in its latest opinion. To avoid this, the health institution defends a vaccination system called “reactive”, already set up in Bordeaux, Brest and Strasbourg.
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The principle would be to vaccinate as a priority the whole of the entourage positive cases. This would then concern the home of the infected person, people close to the workplace, school or university. HAS explains that the other popular vaccination strategy called “in a ring” is not relevant because it concerns only the contact cases of a positive person. This would be insufficient since the incubation period of Covid-19 is 5 days on average, while the protection provided by a vaccine intervenes 12 days after injection.
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The High Authority also confirms that it considers messenger RNA vaccines as the most effective in combating the South African (beta), Brazilian (gamma) and Indian (delta) variants. In France, there is fear of an outbreak of cases of the delta variant, which is much more virulent.
It remains for the moment very minority since in its point of June 18, Public Health France estimated that it represented 4.6% of new cases. But in the United Kingdom or in Moscow, it reaches up to 90% of current contaminations. In recent weeks, clusters have appeared in France in the Landes, Ile-de-France or Strasbourg, without any direct link being established with the source of the variant.
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