Five years after Covid and we are still dealing with changes in our life style and how we look at the world.  We are not the first people to go through an epidemic or pandemic.  This lecture will look at a few of these heath disasters:  The Black Death, Yellow Fever of 1793, Cholera in St Louis 1849 and The Spanish Influenza of 1918.  We will examine causes, cures, and effects on the population (the local population included).