Except in certain unique circumstances, a holder of a medical certificate in the National Aeronautics and Space Administration may not "act as pilot in command or in any other capacity as a required flight crewmember of an aircraft" [REF].
A patient with conditions such as: measles, chicken-pox, hepatitis A, leprosy, typhoid fever, and whooping cough, can return to work immediately after their healing phase or medical tests.