1863				Fourth Cholera Pandemic
1855				Third Pandemic strikes
1843				Polio assumes epidemic proportions
1834				Cholera reaches American shores
1830				Four influneza epidemics in two decades
1829				Cholera reaches Euope
1816				First cholera epidemic breaks out in India
1781				Influenza wave starts in North Africa
1775				North American smallpox epidemic
1771				Plague Riot of Moscow