Proceedings of the International Symposium on Active Immunization against Hepatitis A. Vienna, 27-29 January 1992.
D006506:Hepatitis A / Q000517:prevention & control*; D022362:Hepatitis A Vaccines; D006801:Humans; D014611:Vaccination; D014761:Viral Hepatitis Vaccines
D022362:Hepatitis A Vaccines; D014761:Viral Hepatitis Vaccines