ARI are caused by a variety of respiratory viruses including SARS-CoV-2 (Covid-19), influenza viruses, and other respiratory viruses such as RSV, rhinovirus, and metapneumovirus. The purpose of ARI surveillance is to monitor outbreaks of these viruses.
 
In mainland France, last week (2026w04), the incidence rate of acute respiratory infection (ARI) cases consulting in general practice was estimated at 371 cases per 100,000 population (95% CI [359; 383]).
Subject to future data consolidation, this rate is increasing and corresponds to a similar level of activity to those usually observed at this time of the year (consolidated data for 2026w03: 346 [335; 357]).

At the regional level, the highest incidence rates were noted in: Bretagne (534 [473; 594]), Nouvelle-Aquitaine (491 [439; 543]) and Bourgogne-Franche-Comté (487 [417; 557]). 

Influenza: the incidence rate of influenza cases seen in general practice for an ARI was estimated at 186 cases per 100,000 population (95% CI [159; 212]), corresponding to 124,955 [107,189; 142,721] new cases (data sources: Sentinelles, SOS Médecins, DMGs Côte d’Azur, Rouen and Strasbourg).
Subject to future data consolidation, this rate is slightly increasing (consolidated data for 2026w03:  144 [124; 165]) and corresponds to a moderate level of activity.

RSV infection: the incidence rate of RSV infection cases seen in general practice for an ARI was estimated at 25 cases per 100,000 population (95% CI [16; 33]), corresponding to 16,668 [11,018; 22,318] new cases (data sources: Sentinelles, SOS Médecins, DMGs Côte d’Azur, Rouen and Strasbourg).
Subject to future data consolidation, this rate is slightly decreasing (consolidated data for 2026w03: 40 [31; 50]) and corresponds to a moderate level of activity.

Bronchiolitis in children under one year old : the incidence rate of bronchiolitis cases in children under one year old seen in general practice was estimated at 376 cases per 100,000 population CI [206; 546]) (data source: IQVIA (EMR)).
Subject to future data consolidation, this rate is stable (consolidated data for 2026w03: 339 [153; 525]) and corresponds to a low level of activity.

Covid-19: the incidence rate of Covid-19 cases seen in general practice for an ARI was estimated at 9 cases per 100,000 population (95% CI [5; 13]), corresponding to 6,042 [3,318; 8,766] new cases (data source: Sentinelles).
Subject to future data consolidation, this rate is slightly increasing (consolidated data for 2026w03: 4 [3; 5]) but corresponds to a low level of activity.

The purpose of acute diarrhea surveillance is to monitor gastroenteritis outbreaks.

In mainland France, last week (2026w04), the incidence rate of acute diarrhea cases seen in general practice was estimated at 94 cases per 100,000 population (95% CI [88; 100]). 
Subject to future data consolidation, this rate is stable compared to the previous week and corresponds to a low level of activity compared to those usually observed at this time of the year (consolidated data for 2026w03: 88 [83; 94]).

At the regional level, the highest incidence rates were noted in: Bretagne (143 [111; 175]), Nouvelle-Aquitaine (135 [108; 162]) and Occitanie (131 [105; 156]).

Data sources: Sentinelles and IQVIA (EMR)

In mainland France, last week (2026w04), the incidence rate of Chickenpox cases seen in general practice was estimated at 9 cases per 100,000 population (95% CI [7; 11]). 
Subject to future data consolidation, this rate is slightly increasing compared to the previous week and corresponds to a lower level of activity than those usually observed at this time of the year (consolidated data for 2026w03: 6 [4; 7]).

At the regional level, the highest incidence rates were noted in: Corse (23 [0; 54]), Pays de la Loire (15 [2; 29]) and Hauts-de-France (14 [6; 21]).

Data sources: Sentinelles and IQVIA (EMR)