The flu same symptoms as the traditional cold. Additional symptoms are a high fever and severe muscle aches and pains.The effacts of the flu can also be far more serious.It can cause pneumonia and kill its victims.In the past,the flu killed more people of all ages died in the 1919 flu epidemic.It actually affected younger people more than old because their bodies didn't have defenses against the virus.Nowadays there are vaccines for the flu that protect from some viruses.
Unfortunately,new viruse appear all the time