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A new flu variant spreading in the UK, Canada, and Japan has reached the U.S., where rising cases and low vaccination rates raise concerns about a severe season.
A new H3N2 flu variant, subclade K, is spreading rapidly in the UK, Canada, and Japan and has reached the U.S., where flu activity is rising despite still-low overall levels.
This strain, which emerged after this year’s vaccine was formulated, has mutations that reduce vaccine effectiveness, though early data shows shots still offer protection against hospitalization, especially in children.
Flu vaccination rates in the U.S. are lower than usual, with about 2 million fewer doses administered by retail pharmacies compared to last year, raising concerns about a potentially severe season.
Health officials urge Americans, especially high-risk groups, to get vaccinated as holiday travel increases and the virus spreads.
Una nueva variante de gripe que se propaga en el Reino Unido, Canadá y Japón ha llegado a los Estados Unidos, donde el aumento de los casos y las bajas tasas de vacunación aumentan la preocupación por una temporada severa.