Flu is a disease caused by RNA viruses known as Orthomyxoviridae. These are the influenza viruses. The most common symptoms of the flu include sore throat, fever, muscle aches, headaches, cough, as well as feeling weak and uncomfortable.
Flu is a disease caused by RNA viruses known as Orthomyxoviridae. These are the influenza viruses. The most common symptoms of the flu include sore throat, fever, muscle aches, headaches, cough, as well as feeling weak and uncomfortable.