The proportion of possible cases of reinfection now represents 5.4% of all confirmed cases in France, report the health authorities.
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The virus is still circulating and it even more easily infects people who have already had it. The frequency of possible reinfections with Sars-CoV-2 has increased markedly since last December and the distribution in France of the Omicron variant, underlines, Friday April 1, the French public health agency.
After a short stabilization in early January, the proportion of possible cases of reinfection reported to all Covid cases has been on the rise again since the end of January and now represents 5.4% of all confirmed cases, according to the latest available data. .
Possible cases of reinfection are defined as all persons who presented at least two positive tests recorded in the database carried out 60 days apart or more. The time between the two episodes of infection is 242 days on average.
In all, 685,858 possible cases of reinfection were identified between March 2, 2021 and March 20, 2022, including 95.2% since December 6, 2021, which marks the start of the distribution of the Omicron variant in France.
“It seems likely that the attenuation of the post-infectious or post-vaccination immune response within the French population plays a role (…) in particular in people who have not had a booster dose of the vaccine”comments Public Health France. “It is also very likely that the very strong distribution in France of the Omicron variant, characterized by increased transmissibility and significant immune escape, amplifies this phenomenon”adds the health agency.