Flu Symptoms 2024 Adults And Children. Influenza (flu) is a very contagious viral infection of the respiratory system. Symptoms of the flu usually come on quickly, and can include:

On september 20, 2024, the food and drug administration (fda) approved the nasal spray flu vaccine, flumist, for self or caregiver administration. Learn about flu risks, vaccination, prevention strategies, and how to manage symptoms effectively with this comprehensive flu season guide.