An alarming flambé of cases in the Rhône

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An unusual outbreak of hepatitis cases worried the health authorities in the Rhône department. However, In a press release published on August 19. Moreover, the Directorate General of Health (DGS) alerts on a spectacular increase in infections: 73 cases were identified between January 1 and July 31, 2025, against only 16 cases over the same period in 2024 and 2023. Consequently, An increase of 356 %.

A resurgence alarming flambé cases rhône since July

The phenomenon has accentuated this summer. “The increase in the number of cases in the Rhône has been even more obvious since the beginning of July 2025 with 57 cases reported (34 cases in July. 23 cases between August 1 and 13)”indicates the DGS. All cases concern adults, mainly under 65 years of age. No pediatric case has been reported at this stage.

Lyon, and more particularly the 7th arrondissement, seems to be the epicenter of this resurgence. “The increase in the number of cases in the department. in particular at the level of the 7th arrondissement of Lyon, suggests that the circulation of the virus is currently very active and could increase in the coming weeks”warns the DGS. For the time being, no specific cause has been identified and the investigations are continuing.

How is hepatitis A transmitted?

Hepatitis A is an infection of the liver caused alarming flambé cases rhône by a very contagious virus. It is transmitted by the ingestion of water or soiled foods or by direct contact with an infected person. “The virus being present in the faeces of those affected. the disease is transmitted through contaminated hands or foods”specifies the DGS.

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Symptoms appear on average four weeks after infection, and include a fever, abdominal, nausea, loss of appetite, fatigue, and sometimes jaundice. If most patients heal spontaneously, serious forms, although rare, especially affect adults, especially those with preexisting liver disease.

What gestures to protect yourself?

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The DGS recommends health professionals to remain vigilant “Faced with patients with compatible symptoms, even without a concept of obvious exposure” And to carry out a liver assessment accompanied by serology. It recalls that the declaration of cases is compulsory, in order to quickly trigger public health actions. Note that alarming flambé cases rhône an effective vaccine is also available to prevent hepatitis A. A precautionary measure all the more relevant in a context of strong viral circulation.