Coronavirus: 3,240 clusters investigated in France

France seems to gain control over the epidemic again as the country is in the middle of the second coronavirus epidemic wave. Yet, the search for clusters still goes on. The latest report of the Santé publique France agency states 3,240 active clusters in France, including 1,422 in nursing homes.

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 December 1, 2020, all departments require vigilance:

• Normal level - 0 department
  
  
• Mildly vulnerable - 1 department: (Saint-Pierre-et-Miquelon).
  
  
• Highly vulnerable - 100 departments: (Ain, Aisne, Allier, Alpes-de-Haute-Provence, Hautes-Alpes, Alpes-Maritimes, Ardèche, Ardennes, Ariège, Aube, Aude, Aveyron, Bouches-du-Rhône, Calvados, Cantal, Charente, Charente-Maritime, Côtes-d'Armor, Cher, Corrèze, Corse-du-Sud, Haute-Corse, Côte-d’Or, Creuse, Dordogne, Doubs, Drôme, Eure, Eure-et-Loir, Finistère, Gard, Haute-Garonne, Gers, Gironde, Hérault, Ille-et-Vilaine, Indre, Indre-et-Loire, Isère, Jura, Landes, Loir-et-Cher, Loire, Haute-Loire, Loire-Atlantique, Loiret, Lot, Lot-et-Garonne, Lozère, Maine-et-Loire, Manche, Marne, Haute-Marne, Mayenne, Meurthe-et-Moselle, Meuse, Morbihan, Moselle, Nièvre, Nord, Oise, Orne, Pas-de-Calais, Puy-de-Dôme, Pyrénées Atlantique, Hautes-Pyrénées, Pyrénées-Orientales, Bas-Rhin, Haut-Rhin, Rhône, Haute-Saône, Saône-et-Loire, Sarthe, Savoie, Haute-Savoie, Paris, Seine-Maritime, Seine-et-Marne, Yvelines, Deux-Sèvres, Somme, Tarn, Tarn-et-Garonne, Var, Vaucluse, Vendée, Vienne, Haute-Vienne, Vosges, Yonne, Territoire de Belfort, Essonne, Hauts-de-Seine, Seine–Saint-Denis, Val-de-Marne, Val-d’Oise, Guadeloupe (including Saint Marteen and St Barthelemy), Martinique, Reunion, French Guiana and Mayotte.

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• To be read
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The evolution of clusters in France as of November 12, 2020 (excluding nursing homes and limited family environment):

Since May 9, 2020, a total of 9,055 clusters including 2,006 in nursing homes have been recorded on a domestic basis. Among them, 3,698 (41%) are currently investigated. All in all, clusters have led to 113,963 cases (under 10% of the cases diagnosed).

Clusters investigated are mainly found in school and university environments, in nursing homes, in private or public companies and health facilities. The number of clusters identified - whether in companies, school environments or health facilities - represents a very low share of all these structures. We cannot deduce the frequency of the types of clusters identified, the current SARS-CoV-2 transmission modes in the population.

The six groups for which the proportion of clusters remain the highest are: nursing homes (80%), vunlerable communities (56%), medico-welfare establishments for disabled people (54%), health facilities (51%), penal institutions (44%) and social establishments for housing and insertion (39%).

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How is the cluster situation in Ile-de-France? As of November 19, 2020, the Parisian region totaled 208 active clusters. 958 clusters have been reported in the region since May 8, 2020, including 1,440 in the area including 1,186 since September 2020. To keep on tracking the number of clusters in Île-de-France, keep reading. [Read more]

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