Democratic presidential nominee Hillary Clinton’s health is in the spotlight after a pneumonia diagnosis forced her to cancel a two day campaign swing through California. She’s being criticized for not disclosing it initially and opponents were quick to claim her illness is proof she’s not up to the task of being commander in chief. Of course, presidents are humans who get sick like the rest of us, but in the past, the public was rarely notified when a sitting president faced health problems. For instance, President William Henry Harrison, who became ill after his inaugural address and died of pneumonia after 32 days on the job. He was one of four presidents – along with Taylor, Harding and Franklin Roosevelt – who died in office.