Older children and adults usually build up immunity to the disease. Hand, foot, and mouth disease is rare in people older than 10. However, infection is still possible, especially among adults with compromised immune systems.
Presidents Theodore Roosevelt and Franklin Delano Roosevelt were fifth cousins, and a look back into the genealogical charts of the presidential office find numerous family connections. FDR, in fact, was related to 11 former presidents, the most of anyone on the list, according to History.com.
His second child, and first son, was named Theodore Roosevelt, III, but was generally known as Theodore Roosevelt, Jr., and who also served as Assistant Secretary of the Navy, like his father, and his fifth cousin (once removed), Franklin D. Roosevelt.