Enlaces web:

European Medicines Agency - EMA     Euvac.net     Centers for Diseases Control and Prevention (EE. UU.)     European Center for Disease Prevention and Control     Immunisation - National Health Service (Reino Unido)     Immunization and Vaccines - Public Health Agency of Canada     Immunise Australia Program     Organización Mundial de la Salud - OMS     Public Health Agency of Canada     U. S. Food and Drug Administration - FDA (EE. UU.)