Key Points

• Influenza/flu-like illnesses: very high activity; for the fifth consecutive week, all indicators tracked at the regional level are rising sharply (calls to SOS Médecins, emergency room visits, positive influenza test results from virology laboratories); the same trend is observed at the national level. The predominance of a variant of the A(H3N2) virus compared to the vaccine strain has been confirmed. The vaccine’s efficacy against this virus, as assessed in North America, is very low to nonexistent. These factors suggest a greater impact on older and vulnerable populations than in the previous season, with a higher risk of outbreaks in settings with older residents.

• Bronchiolitis: Emergency room visits remain high; the outbreak is not yet over, both regionally and nationally.

• Gastroenteritis: high activity in the Languedoc-Roussillon region; emergency room visits remain high, with nearly 3 out of 4 patients seen in emergency rooms being under 6 years of age.

• Pneumonia: Emergency room visits for pneumonia are slightly decreasing in the Languedoc-Roussillon region. Nationally, the number of diagnoses recorded in emergency department data continues to rise.