Officials warn that the flu season has begun 'unusually early', prompting virologists to call on Britons to resume wearing face masks in crowded spaces like covid restrictions 'Superflu' with extra-mutations sweeps Britain as NHS warns of 'worst winter ever' (Image: Getty Images)

The NHS is bracing for what senior officials describe as a “historic crisis” this winter, as a heavily mutated strain of flu tears through the country and hospital admissions surge to record seasonal levels.

Health leaders say the so-called “super flu” , a drifted influenza A(H3N2) strain also known as “subclade K”, is proving more infectious and causing more severe illness than the viruses that dominated last year . Experts fear the new variant is leaving people more vulnerable not only to flu itsel

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