Clinical Trial: Study on Effectiveness of 2-dose Live Attenuated Varicella Vaccine

Study Status: Completed
Recruit Status: Unknown status
Study Type: Interventional

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Official Title: Study on Effectiveness of 2-dose Live Attenuated Varicella Vaccine

Brief Summary:

The objective of the study is as follows:

1. To know the antibody level during different interval after received 1 dose varicella vaccine.
2. To know safety and effectiveness of received 2 doses varicella vaccine with different interval.
3. To know safety and effectiveness of received varicella vaccine and MMR at the same time.

To achieve that, this study selects children with specific varicella vaccine history, gives 1 or 2 doses varicella vaccine, collects blood specimens and makes a follow-up visit after vaccination.

All blood specimens will be tested by a third-party detection institution.