This photo of president Calvin Coolidge's family was taken on June 30, 1924. Sixteen-year-old Calvin Junior is on the left. That same day young Calvin developed a blister on his foot while playing tennis with older brother John on the White House tennis court. The blister became infected, resulting in blood poisoning. There were no antibiotics in 1924. He died a week later on July 7. I often use this story as an example of the 'good old days' not being so good if one became ill.