Public Domain Mark
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
Address of H. M. Alexander, M.D : before the fourth pharmaceutical meeting of the College of Pharmacy, Philadelphia, Pa., January 16, 1894 ; vaccine virus. Public Domain Mark. Source: Wellcome Collection.
Provider
This material has been provided by the Harvey Cushing/John Hay Whitney Medical Library at Yale University, through the Medical Heritage Library. The original may be consulted at the Harvey Cushing/John Hay Whitney Medical Library at Yale University.