WordOutt

I am sure you've all heard of the disease Yellow Fever. It killed millions of people all over the world. In 1937, there was a young doctor named Max Theiler who was testing a vaccine on mice. Theiler and his coworkers attempted the use of 99 different substrains of the virus in their vaccine. But each and every time, the mice died, until finally, on the hundredth attempt, they found it. so lets just hope for the best and stay positive and stay home.