1919: If You Must Smoke While Wearing Your Influenza Mask April 13, 2021 No Comments Popular Science Monthly May 1919 (Page 33) If You Must Smoke While Wearing Your Influenza Mask Source Links: Read via Google Books: If You Must Smoke While Wearing Your Influenza Mask Previous Post Next Post You may also like May 6, 2021 1997: President Offers Apologies for Tuskegee Syphilis Study February 3, 2021 1949: MEASLES SAVES BABY’S LIFE May 6, 2021 1972: Syphilis Study Tip of Iceberg