This study is an open clinical trial of the EV71 vaccine (Vero cell), Inactivated manufactured by Sinovac Research & Development Co.,Ltd.The purpose of this study is to evaluate the safety of EV71 vaccine (Vero cell), Inactivated co-administration with other vaccines

This study is an open clinical trial in children aged 6-71 months old. The purpose of this study is to evaluate the safety of EV71 vaccine (Vero cell), inactivated co-administration with other vaccines.The EV71 vaccine was manufactured by Sinovac Biotech Co.A total of 12500 subjects aged 6-71 months old were enrolled.All subjects received one dose of EV71 vaccine and one of other vaccines(such as MMR vaccine,encephalitis vaccine,mumps vaccine,inactivated poliomyelitis vaccine,influenza vaccine and so on ) at the same time.

Inclusion Criteria:

• 6 months ≤ Age of enrollment ≤71 months;
• Voluntary and self-funded completion of EV71 vaccine combined immunization with one of the other type I or II vaccines;
• The subject and/or guardian can understand and voluntarily sign the informed consent form;
• Subjects and their legal guardians are able to attend follow-up visits and follow all study procedures (such as cooperating in completing safety observation notes).

Exclusion Criteria:

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In this study,only children aged 6-71 months old who were judged by vaccination doctors to be eligible for vaccination and voluntary and self-funded completion of EV71 vaccine combined immunization with one of the other type I or II vaccines were enrolled.