The flu is a contagious respiratory illness caused by influenza viruses that infect the nose, throat, and lungs. It can cause mild to severe illness and, at times, can lead to death. Every flu season is different, and the flu …
The flu is a contagious respiratory illness caused by influenza viruses that infect the nose, throat, and lungs. It can cause mild to severe illness and, at times, can lead to death. Every flu season is different, and the flu …