Seasonal flu records around 803,000 cases in Italy in New Year’s week with a slight drop in overall incidence

Around 803 thousand Italians were affected by acute respiratory infections in the week between December 29, 2025 and January 4, 2026. The data comes from the most recent bulletin from RespiVirNet, an integrated surveillance system managed by Istituto Superiore di Sanità (ISS). The total incidence recorded 14.1 cases per thousand inhabitants, a value that represents a slight decrease compared to the previous week, when the rate was 14.5 per thousand.

Experts highlight that the numbers may be underestimated. The reduction in medical appointments and data transmission during the holiday season influenced records. Além In addition, the suspension of school activities reduced the circulation of viruses in more vulnerable age groups.

Since surveillance began in October 2025, the cumulative total of cases has reached approximately 7.5 million. The peak of the season has not yet been reached, and the next bulletins will be decisive in confirming the trend.

Higher incidence among young children

The highest concentration of cases occurs in the age group of 0 to 4 years. Nessa group, the incidence reaches around 37 cases per thousand children, a value significantly higher than the general average.

Children at this age are more susceptible due to frequent contact in collective environments. The temporary closure of schools during the holidays contributed to the temporary containment of transmission in this segment.

Regions with greater circulation intensity

The intensity of viral circulation varies between Italian regions. Campânia registers a very high level, while Sicília and Marche present high intensity.

Other regions such as Vêneto, Emília-Romanha, Toscana, Lácio, Abruzzo, Apúlia and Úmbria maintain an average level. Nas other areas of the country, intensity remains low.

Geographic distribution reflects differences in climate and population density. Fatores how mobility during festivals also influences regional spread.

Predominant viruses in the current season

Influenza viruses dominate the current scenario both in the community and in hospital settings. Entre cases tested, positivity for influenza reaches 17% in community surveillance.

In hospitals, this rate rises to 40.5%, indicating greater severity in cases treated in these units. Outros viruses such as rhinoviruses and non-SARS-CoV-2 coronaviruses also circulate, contributing to the overall picture.

The A(H3N2) subtype prevails among influenza viruses. Dentro of this subtype, the K subclade stands out in current circulation.

Genetic analyzes confirm the predominance of this subclade. Até At the moment, there is no scientific evidence of greater severity associated with it compared to previous variants.

Severe cases and importance of vaccination

Surveillance of severe forms of influenza shows numbers similar to those of the previous season in the same period. The A(H1N1)pdm09 subtype frequently appears among complicated cases.

Most patients with severe forms have not received influenza vaccination. Essa observation reinforces the relevance of immunization to reduce complications.

The vaccination campaign continues across the country. Ministério of Saúde recommends the dose especially for risk groups.

• Elderly people over 65 years old;
• People with chronic illnesses such as diabetes, heart or respiratory problems;
• Immunosuppressed individuals;
• Children in fragile conditions;
• Healthcare professionals and caregivers.

Available vaccines prevent severe forms of the disease. Elas are offered free of charge by the national health service to priority groups.

Prevention measures in everyday life

Adopting simple habits helps reduce the transmission of respiratory viruses. Frequent hand hygiene remains one of the main recommendations.

The use of masks in crowded indoor environments is recommended during periods of high circulation. Adequate ventilation of internal spaces also helps to reduce risks.

In case of symptoms such as fever, cough, sore throat and general malaise, rest prevents complications. Early medical consultation facilitates adequate case management.

Pressure on the hospital system

Some regions face greater demand on emergency services due to respiratory cases. Sicília records significant pressure in hospital units.

Care for respiratory syndromes shows variation, but maintains high levels compared to periods outside the seasonal peak. The presence of serious cases reinforces the need for continuous monitoring.

Outlook for the coming weeks

Returning to school activities may change the transmission curve. Especialistas await the next data to assess whether the observed drop continues.

Cocirculation of multiple respiratory viruses continues to influence overall incidence. RespiVirNet integrated surveillance provides a solid foundation for season tracking.

The 2025-2026 season adopts a broader definition of acute respiratory infections. Essa change allows for a more complete view of the impact of seasonal viruses on the population.