First Flu Symptoms 2024. Influenza (flu) can cause mild to severe illness, and at times can lead to death. Symptoms of the flu include:
If you get rsv, on the other hand, it may take 4 to 6 days before symptoms show. All report symptoms such as headaches, coughs, runny/blocked noses, sore throats, fevers, chills, achy and sore muscles