Safety and Immunogenicity of Skyvaricella Injection in Healthy Volunteer Vietnamese Children From 12 Months to 12 Years Old

This is a cross-over, open-label, single-group study. The study subjects were children 12 months to 12 years of age who will be vaccinated with a single dose. The duration of follow-up for safety evaluation and immunogenicity (on a small group) is 6 weeks (+ 2 weeks). The main target: • Evaluating the safety of live attenuated Varicella vaccine \[Oka / SK\], lyophilized powder and solvent for subcutaneous injection (SKYVaricella inj.) in healthy Vietnamese children from 12 months to 12 years, with a single injection. Secondary target: • Assess the immunogenicity of live attenuated Varicella vaccine \[Oka / SK\], lyophilized powder and solvent for subcutaneous injection (SKYVaricella inj.) in a small group of healthy Vietnamese children from 12 months to 12 years, with a single injection.