Immunogenicity and Interchangeability of Two Inactivated Hepatitis A Vaccines

Inclusion Criteria: * Healthy children aged between 1.5 and 5 years, with no history of hepatitis A virus infection or hepatitis A vaccine vaccination * Provided birth certification or vaccination card * Parent(s) or legal guardian(s) are able to understand and sign the informed consent Exclusion Criteria: * Axillary temperature \> 37.0 centigrade at the time of dosing * Subject that has a medical history of any of the following: allergic history, or allergic to any ingredient of vaccine * Serious adverse reactions to vaccines such as anaphylaxis, hives, respiratory difficulty, angioedema, or abdominal pain * Autoimmune disease or immunodeficiency * Congenital malformation, developmental disorders or serious chronic diseases (such as Down's syndrome, diabetes, sickle cell anemia or neurological disorders) * Bleeding disorder diagnosed by a doctor (e.g. factor deficiency, coagulopathy, or platelet disorder requiring special precautions) or significant bruising or bleeding difficulties with IM injections or blood draws * History or family history of convulsions, epilepsy, brain disease and psychiatric * History of any blood products within 3 months * Administration of any other investigational research agents within 30 days * Administration of any live attenuated vaccine within 30 days * Administration of subunit or inactivated vaccines within 14 days * Any medical, psychiatric, social condition, occupational reason or other responsibility that, in the judgment of the investigator, is a contraindication to protocol participation or impairs a volunteer's ability to give informed consent