The circulation of a flu variant that is advancing rapidly has generated warnings in the British health system.
While cases multiply and hospitals register a notable increase in admissions, public health specialists point out that the season could be one of the most intense in recent years.
The H3N2 variant described by health authorities as “nasty”, has been associated with a possible “wave” of illness before Christmas. According to official data, flu admissions have already grown by 56% compared to the same period last year, and experts insist that the seasonal peak has not yet been reached. The recommendations of the authorities include the use of a mask outdoors when discomfort appears and the call for those who meet the criteria to receive the available vaccination.
In this context, ‘The Self-reliant’ consulted Dr. Giuseppe Aragona, GP and clinical advisor at Prescription Doctor, to better understand the behavior of the variant and the most effective prevention measures.
health authorities report a 56% increase in hospital admissions due to flu infection. Photo: iStock
Characteristics of the virus and progression of the season
H3N2 corresponds to one of the most widely circulating strains in the world and,according to the United Kingdom Health Security Agency (UKHSA),it is indeed currently identified as the predominant variant in England. Dr.Aragona explained that Its name derives from the surface proteins hemagglutinin (H) and neuraminid
Increase in H3N2 Flu Cases in the UK Prompts Vaccination Push
Cases of influenza A(H3N2) are rising in the United Kingdom, with over 6,000 cases reported in the first half of September, linked to the disease, up from around 3,500 the previous year, although below the 16,000 reported in 2022-2023. Symptoms appear suddenly and include fever, cough, runny nose, and severe malaise.
Prevention measures and effectiveness of vaccination
According to Dr. Aragona, the “most effective” strategy to reduce the risk of serious complications from H3N2 is vaccination, especially for those who belong to a “higher risk group.” “The vaccine may not prevent all infections, but it significantly reduces the risk of severe disease and hospitalization,” he said.He also recommended reinforce hand hygiene, cover coughs or sneezes, avoid close contact with sick people and keep spaces ventilated.
New data from the UKHSA indicates that the 2025-2026 vaccine is 70% to 75% effective in preventing hospitalization in children aged two to 17 years, and 30% to 40% effective in adults. Dr. Jamie López Bernal, consultant immunization epidemiologist, said the results offer “reassuring evidence” about the vaccine’s protection despite concerns arising from the predominant subclade. He also “strongly encouraged” eligible people to get vaccinated “as soon as possible,” calling it the “best defence.”
Deputy chief medical officer Dr Thomas Waite added: “Flu can be an unpleasant infection for many and life-threateni