Historical snapshot: development of the hepatitis A vaccine.
D006506:Hepatitis A / Q000266:history* / Q000517:prevention & control; D022362:Hepatitis A Vaccines / Q000266:history*; D049673:History, 20th Century; D049674:History, 21st Century; D006801:Humans; D008889:Military Personnel; D014481:United States
D022362:Hepatitis A Vaccines