John Howard Cook 's younger brother , Sir Albert Cook , went on to become a prominent medical missionary in his own regard .
Many of Cook 's siblings died during childhood as a result of diseases like diphtheria , pneumonia , and typhoid fever .
Cook     's younger brother , Cook Cook   , went on to become a prominent medical missionary in Cook 's own regard .
Many of Cook 's siblings died during childhood as a result of diseases like diphtheria , pneumonia , and typhoid fever .