Symptoms Of Flu 2025 Nhs Uk. Flu is caused by a group of different group of viruses and symptoms tend to be more severe and last longer. Brits are being urged to see their gp urgently if flu symptoms persist beyond a week, as the nhs braces for what could be the worst flu season on record.
You can catch flu all year round, but it is especially common in winter, which is why. Flu can lead to serious illness, especially in children, with more than 8,000.
