Why is this winter flu season so bad?
The IndependentSign up for our free Health Check email to receive exclusive analysis on the week in health Get our free Health Check email Get our free Health Check email SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our privacy policy As a surge in the number of patients with flu piles pressure on hospitals, health experts have warned this winter flu season is more infectious than last year’s. The UK Health Security Agency’s chief medical advisor Professor Susan Hopkins said last year’s flu season was relatively mild, and cases were much higher this season. open image in gallery Derriford Hospital is one of at least eight English hospitals that issued a critical incident alert to help manage a surge in presentations ) Changing strains of influenza can lead to more patients Dr Leon Peto, a consultant in infectious diseases and microbiology and clinical coordinator for the RECOVERY trial at the University of Oxford, said a season’s rise in flu cases can be can be triggered by the strains of the virus. “The severity of each flu season is variable, even given the same amount of flu that’s around we might see different amounts of severe disease.” Dr Peto said the influenza strains can change slightly year to year, and it was often those slight changes that caused the winter epidemics.