Ailing U.S. presidents Hillary Clinton’s pneumonia diagnosis has made her health a prominent issue in the U.S. election, but this is not the first time that the fitness of a president or candidate has become a central political issue Hillary Clinton stumbles leaving 9/11 ceremony Woodrow Wilson 1913-1921 Multiple strokes: Paralysed down left side. Paralysis was kept secret, but once discovered, it instigated 25th Amendment, stating vice president will assume power in event of president’s death or disability Dwight D. Eisenhower 1953-1961 Heart attack: Left him hospitalised for several weeks while in office Also: Crohn’s disease (inflammation of intestine), and light stroke that left him temporarily unable to speak Ronald Reagan 1981-1989 Cancer: Treated for both prostate and skin cancer Also: Urinary tract infections, arthritis, temporomandibular joint disease (dysfunction of jaw), Alzheimer’s disease towards end of Administration Franklin D. Roosevelt 1933-1945 Polio: Struck down aged 39, paralysing both legs. Personally funded research which led to creation of polio vaccine Also: Anorexia nervosa. Killed by cerebral haemorrhage in 1945 John F. Kennedy 1961-1963 Addison’s disease: Incurable adrenal gland disorder, characterised by low blood pressure, weakness and bronze discolouration of skin Also: Treatment for chronic back pain led to painkiller addiction George H.W. Bush 1989-1993 Staphylococcal infection: Almost killed him as teen Also: Head and lung trauma, cysts, bleeding ulcers, arthritis, abnormal heart rhythm, Graves’ disease (autoimmune disease affecting thyroid) Sources: Healthline Media, wire agencies Pictures: Zdenek Gazda, Getty Images