What is Seasonal Flu?

There are 4 types of seasonal influenza (flu) viruses, types A, B, C and D. Flu A and B viruses circulate and cause seasonal epidemics of disease. Seasonal flu is characterised by a sudden onset of fever, cough (usually dry), headache, muscle and joint pain, severe malaise (feeling unwell), sore throat and a runny nose. The cough […]