The viral circulation is still going strong in France. The amount of tests performed has been increasing for weeks and now exceeds 1.2 million per week, with a 7.6% positivity rate in France as of September 30, 2020.
The latest report of the Santé publique France agency states 1,235 active clusters in France, including 64 new these past 24 hours. 3,368 clusters have been reported since containment exit started in France.
A cluster is controlled when contacts are being followed-up and there is no new case 7 days after the last case. A cluster is closed when there is no new case 14 days after the beginning of the signs of the latest case AND the end of the two-week self-isolation of contacts.
But what is a cluster?
Health authorities speak about cluster when there are at least 3 confirmed or suspected Covid-19 contamination cases on a 7-day basis and that these cases belong to the same community or took part in the same gathering, whether they know each other or not.
Where are they at today?
As of September 30, 2020, 93 departments require vigilance:
As of Friday September 25, 2020 the Île-de-France reports 72 active clusters.
France and clusters as of September 21, 2020 (excluding nursing homes and limited family environment)
In W38, the number of clusters remains very high with 391 clusters reported (VS 428in W36). The average number of case per cluster seems lower in July-August with 9 cases per cluster against 17 in May-June. All in all, 2,442 clusters have been reported (95% in mainland France), including 23,573cases.
As of September 21, 899 clusters (37%) were being investigated including 222 (25%) highly critical (potential transmissions, gravity criteria); 10% are controlled, 53% are closed and 6 clusters (0.2%) have infected a community.
Among the 2,442 clusters, clusters that broke out in facilities excluding health facilities (HF) remained part of the most represented collectivities (26%), followed by the extended family environment (several homes) and public and private events temporarily gathering people (20%) and HF (16%). Clusters in schools and universities represented 32% of the clusters investigated.