Epidemiologist Theodora Psaltopoulou discusses rising seasonal infections.
Epidemiologist Theodora Psaltopoulou discusses rising seasonal infections.
Epidemiologist Theodora Psaltopoulou discusses rising seasonal infections.

Health Systems Face Pressure Amid Rapid Spread of Highly Transmissible Flu K

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Health Systems Face Pressure Amid Rapid Spread of Highly Transmissible Flu K

Politics, Economics and U.S. News

Published on: Jan 2, 2026

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Health experts warn that a mutated flu strain is driving a sharp rise in infections and emphasize the urgent need for vaccination.

Seasonal Viruses Surge as Mutated Flu Strain Drives Hospital Pressures

Health experts are observing a sharp rise in respiratory infections following the holiday period, with epidemiologist and pathologist Theodora Psaltopoulou highlighting the factors behind this seasonal spike. Respiratory viruses typically dominate the winter months, yet this year’s wave has intensified due to the emergence of the highly transmissible superflu or flu K, a mutated sub variant of influenza A. Healthcare systems in several regions have faced significant strain, including the UK and New York, where authorities have recorded around 3,000 flu related deaths, among them 8 children.

Concerns about the effectiveness of the current flu vaccine were addressed by Psaltopoulou, who pointed to recent ECDC findings showing an effectiveness rate above 55%. The vaccine has demonstrated strong protection against severe illness, offering a critical defense not only against influenza but also other circulating respiratory viruses.

Protective guidance continues to focus on a three part strategy aimed at reducing transmission and preventing complications. Vaccination is strongly recommended for people over 60, children under 5 and individuals aged 5 to 59 with underlying medical conditions, and it remains available free of charge. Mask use in crowded indoor spaces serves as an additional layer of protection for vulnerable groups.

Timely medical consultation plays a decisive role when symptoms emerge, particularly for high risk individuals. Early diagnosis enables immediate initiation of antiviral treatment, which substantially lowers the likelihood of severe disease.

Public health officials expect the heightened circulation of seasonal viruses to continue during the first 2 months of the year, with the surge potentially extending until February. Vaccination continues to be advised even at this stage of the outbreak, as it remains an effective preventive measure throughout the season.