Tina Crafoord of the Public Health Agency in Sweden warned about increasing flu cases driven by a new H3N2 subclade K variant causing early and sharp flu season onset. Vaccination rates against flu are below target across Europe and the USA, with particularly low coverage among older adults, healthcare workers, and pregnant women. Public health officials stress that the rapid spread of the H3N2 subclade K variant underlines the urgent need for enhanced vaccination and vigilance during the ongoing flu season.