World health authorities are warning that the 2025 flu season is shaping up to be one of the most challenging in recent years, with local transmission intensifying earlier than expected and hospitals globally already reporting sustained pressure…
While winter flu waves are not unusual, specialists point to the emergence of a new influenza variant, known as subclade K, a mutated form of influenza A (H3N2), as a key factor behind the unusually high circulation seen this year.
International surveillance shows that this strain is now dominant across large parts of Europe, including neighbouring regions of France, and is increasingly detected in Monaco. Although the seasonal flu vaccine was developed before subclade K was identified, health experts stress that vaccination remains the most effective protection available. Even when infection occurs, vaccination significantly reduces the risk of severe illness, hospitalisation and complications, particularly among older adults, pregnant women and those with chronic conditions.
Local pharmacies in the Principality report strong uptake of the flu vaccine, with no supply shortages, while the Department of Social Affairs and Health continues to urge residents not to delay immunisation. Authorities also emphasise the importance of everyday preventive measures, including regular handwashing, ventilating indoor spaces, wearing a mask when experiencing symptoms and avoiding close contact with vulnerable individuals when unwell.
Health specialists underline that subclade K reflects viral evolution rather than a pandemic threat. However, its rapid spread helps explain why Monaco, like much of Europe, is facing a more intense and earlier flu season than usual.
Sources: World Health Organization (WHO); Scientific American
Photo by Kristine Wook
