April 1940 Issue [Article] He Who Gets Sick Download PDF Adjust Share by George W. (George William) Gray, This article is only available as a PDF to subscribers. Download PDF Tags 20th century Constitution Human beings Immunological aspects Immunology Natural immunity Poliomyelitis Research United States More from George W. (George William) Gray Which scientists win Nobel prizes? New discoveries about the cosmos Stars forming, burning, and dying (part II) New discoveries about the birth, life, and death of the sun and other stars This hydrogen universe (part I) Adjust Share