Coronavirus: 1,235 clusters investigated in France as of September 30, 2020

Published by Julie M. · Published on 30 September 2020 at 19h30 · Updated on 1 October 2020 at 09h52
As of Wednesday September 30, 2020, France reports 1,235 coronavirus clusters currently being investigated, including 64 new ones over 24 hours. 65 departments in 104 are position of vigilance, and 69 departments have an incidence rate over 50 for 100,000 and are therefore in red area, and 14 of them are in scarlet area.

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:

  • Mildly vulnerable - 28 departments: (Aisne, Allier, Ardèche, Ardennes, Aude, Calvados, Cantal, Charente-Maritime, Deux-Sèvres, Dordogne, Eure, Eure-et-Loir, Haut-Rhin, Haute-Savoie, Haute Saône, Loir et Cher, Lot, Lot et Garonne, Mayenne, Mayotte, Meuse, Moselle, Morbihan, Nièvre, Réunion, Territoire de Belfort, Vendée, Vosges)

  • Highly vulnerable - 65 departments: (Martinique, Guadeloupe (including Saint Marteen and St Barthelemy), Ain, Alpes de Haute Provence, Alpes-Maritimes, Ariège, Aube, Aveyron, Bas-Rhin, Bouches-du-Rhône, Charente, Côte d’Or, Corrèze, Corse du Sud, Doubs, Drôme, Essonne, Gard, Gers, Gironde, Guyane, Haute Corse, Hautes Alpes, Haute-Garonne, Haute Loire, Haute-Marne, Hautes Pyrénées, Hauts-de Seine, Haute Vienne, Hérault, Indre-et-Loire, Loiret, Ille-et-Villaine, Isère, Landes, Loire, Loire-Atlantique, Lozère, Maine-et-Loire, Marne, Meurthe et Moselle, Nord, Oise, Paris, Pas-de-Calais, Puy de Dôme, Pyrénées Atlantique, Pyrénées Orientales, Rhône, Savoie, Somme, Sarthe, Seine et Marne, Seine-Maritime, Seine-Saint-Denis, Saône et Loire, Tarn, Tarn-et-Garonne, Val-de-Marne, Val d’Oise, Var, Vaucluse, Vienne, Yonne, Yvelines).

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)

Coronavirus : 1.091 clusters en cours d'investigation en France ce 25 septembre 2020Coronavirus : 1.091 clusters en cours d'investigation en France ce 25 septembre 2020Coronavirus : 1.091 clusters en cours d'investigation en France ce 25 septembre 2020Coronavirus : 1.091 clusters en cours d'investigation en France ce 25 septembre 2020

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.

Practical information

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