A study by Feinstone et al identified infectious hepatitis as Hepatitis A in 1973. Linked evidence RLIT0002274 - Hepatitis A Detection by Immune Electron Microscopy of a Viruslike Antigen Associated with Acute Illness by Stephen M Feinstone and others - 08 Nov 1973 Chronology Information Date: 26 February 1973 Chapter/issue Knowledge of Risk Before 1970