Influenza 2024 Symptoms. Influenza, aka the flu, is a highly contagious virus that infects your nose, throat, and sometimes your lungs. Influenza b is one of the most common types of flu strains.
While influenza can be mild, it can also cause serious illness in otherwise healthy people of all ages, leading to hospitalisation and sometimes even death. It causes symptoms like head and body aches, sore throat, fever and respiratory symptoms, which can be severe.