Study Status: Enrolling by invitation
Recruit Status: Enrolling by invitation
Study Type: Interventional
Official Title: Phase 4 Study of the Varicella Vaccine After the 2nd Dose Vaccination
Brief Summary: To investigate the safety, immunogenicity and immune effect of the Varicella vaccine after the 2nd dose vaccination in Chao yang district, Bei jing, since the 2nd varicella vaccination was promoted by Beijing Center for Disease Control and Prevention in November, 2012.