You just need to stop and think about what is bothering you. The answer will often come from the most surprising sources. In the years 1918 and 1919, flu was the epidemic of all time. There were not many ways to treat the flu. As a result, over 20 million people died.
Influenza epidemics spread fast because it is a virus that is very contagious.
Flu symptoms are much worse than a cold. The flu will affect your entire body. There is no cure for viruses, so most flu cases just run their course in about one to two weeks. Influenza is spread easily by coughing and sneezing. The incubation period lasts for two to three days.