[youtube=http://www.youtube.com/watch?v=sHK3oWpD5ZI&feature=related] In an article on Bloomberg this morning, Elizabeth Lopatto gives us a quick rundown of two other flu epidemics from the last century and their vastly different impact. From Bloomberg: Doctors don’t know yet if the swine flu that may have killed at least 149 people in Mexico is more like the 1918 form…