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 (2025w03), the incidence rate of acute respiratory infection (ARI) cases consulting in general practice was estimated at 525 cases per 100,000 population (95% CI [498; 552]) (data source: Sentinelles).
Subject to future data consolidation, ARI activity appears to be slowing down while remaining at a high level of intensity (consolidated data for 2025w02: 514 [489; 539]).

At the regional level, the highest incidence rates were noted in: Bretagne (994 [827; 1,160]), Corse (825 [603; 1,048]) and Grand Est (636 [534; 738]) (source: Sentinelles).

Influenza: the incidence rate of influenza cases seen in general practice for an ARI was estimated at 260 cases per 100,000 population (95% CI [235; 286]), corresponding to 174,601 [157,215; 191,987] new cases (sources: Sentinelles, SOS Médecins, DUMG Rouen and DERMG Côte d’Azur)
 Subject to future data consolidation, this rate is slightly decreasing compared to the previous week (consolidated data for 2025w02: 270 [245; 295]), but remains at a high level of activity. By age groups, the incidence was increasing in children (0-14 years) for the second consecutive week (following the end of the holidays), and slightly decreasing in adults (15 and over years). This trend among adults will need to be confirmed in the coming weeks, because the increase observed among children could reactivate the transmission of influenza viruses in adults.

RSV infection: the incidence rate of RSV infection cases seen in general practice for an ARI was estimated at 31 cases per 100,000 population (95% CI [20; 42]), corresponding to 20,576 [13,276; 27,876] new cases (sources: Sentinelles, SOS Médecins, Rouen and Côte d’Azur Universities).
Subject to future data consolidation, this rate is stable compared to the previous weeks (consolidated data for 2025w02: 36 [26; 46]).

Bronchiolitis in children under 2: data from week 2025w01 to 2025w03 are currently not available (source: IQVIA (EMR)).

Covid-19: the incidence rate of Covid-19 cases seen in general practice for acute respiratory infection was estimated at 9 cases per 100,000 population (95% CI [6; 11]), corresponding to 5,731 [4,271; 7,191] new cases (source: Sentinelles).
Subject to future data consolidation, this rate is stable compared to those of the previous weeks (consolidated data for 2025w02: 10 [8; 12]) and is still at a low level of activity.

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

In mainland France, last week (2025w03), the incidence rate of acute diarrhea cases seen in general practice was estimated at 108 cases per 100,000 population (95% CI [94; 122]). 
Subject to future data consolidation, this rate is slightly increasing compared to the previous week (consolidated data for 2025w02: 94 [82; 106]) and is at a similar activity level than those usually observed during this period.

At the regional level, the highest incidence rates were noted in: Provence-Alpes-Côte d’Azur (140 [72; 208]), Grand Est (133 [89; 176]) and Corse (131 [50; 213]).

Data source: Sentinelles

In mainland France, last week (2025w03), the incidence rate of Chickenpox cases seen in general practice was estimated at 3 cases per 100,000 population (95% CI [1; 5]). 
Subject to future data consolidation, this rate is decreasing compared to the previous week (consolidated data for 2025w02: 9 [4; 14]) and is at a lower level of activity than those usually observed during this period.

At the regional level, the highest incidence rates were noted in: Corse (14 [0; 39]), Grand Est (8 [0; 19]) and Centre-Val de Loire (7 [0; 15]).

Data source: Sentinelles