Life expectancy was very low and your chances on surviving an illness was depended on who you were and what treatment you received
Rich were more likely to afford medical treatment
famine and war were main killers. A bad harvest due to bad weather or floods mean malnourishment for many meaning many people could catch disease
Many people died from dysentery, typhoid, smallpox and measles. There was an estimate of 10 percent of England's population died from these diseases in the early 14th century.
childbirth was extremely dangerous and it was likely that 30 percent of children died before the age of 7