Question asked by Lydia on 06/06/2020
Hello,
A cluster, according to Public Health France, is a “Focus of transmission or episode of grouped cases”, defined by “The occurrence of at least three confirmed or probable cases, in a period of seven days, and which belong to the same community or participated in the same gathering of people, whether they know each other or not”.
Since May 11, these clusters have been identified by regional health agencies, thanks to tracing and screening of contact cases, thus making it possible to control them.
According to the latest epidemiological point from Public Health France published on Thursday, on June 3 and excluding nursing homes and restricted family environments, 150 clusters have been identified in France since April 13, the vast majority (136) since deconfinement. Among them, 142 are located in mainland France and 8 in the overseas departments or regions.
These clusters, 66% of which are made up of more than 5 cases, are primarily located, for almost a third, in healthcare establishments (27%). Next come public or private enterprises (17%), social and integration establishments (17%), establishments for the disabled (8%), extended family environments (with several family homes, 6%), communities. say vulnerable like the “Travellers“ or migrants (6%), schools or universities (3%), prisons (3%), temporary gatherings of people (1%) and crèches (1%). Note that, for the time being, no cluster has been identified in transport, whether it be trains, boats or planes.
According to the health agency, “The majority (62%) of these clusters are under investigation (active clusters in terms of new cases with the implementation of first control measures), 23% have been brought under control (with follow-up of contacts in progress and absence of new cases 7 days after the last case), and 15% were closed (absence of new cases 14 days after the start date for signs of the last case and the end of the fortnight of all contact cases) “.
Within these investigated clusters, 40% have a “High criticality”. However, “No uncontrolled community dissemination (occurrence of new cases outside the community and linked to the cluster) is reported”, according to Public Health France.
Finally, in geographic terms, the clusters still under investigation (around a hundred) have spread to different places on the territory, with a majority of them in the Bouches-du-Rhône (8), the North (7 ), Bas-Rhin (6) and Guyana (5).
Luc Peillon
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