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Updated: Jun 16, 2026

Development of an IFN-γ ELISpot Assay to Assess Varicella-Zoster Virus-specific Cell-mediated Immunity Following Umbilical Cord Blood Transplantation
Published on: July 9, 2014
[Study on epidemiological effect of the freeze-dried attenuated live varicella vaccine]
Fu-bao Ma1, Lin-yun Luo, Long-hua Zhang
1Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, Jiangsu, China.
Objective:
To evaluate the safety and epidemiological effect of the Freeze-dried Live attenuated varicella vaccine.
Methods:
A random, double-blind control clinical trial was adopted.
Results:
In the observation period, the incidence of varicella was 0.8 per thousand in the experimental group and 8.7 per thousand in control group. There was a significant difference (B.P=0.000017). Vaccine effectiveness (VE(%)) was 90.8%, the lower limit of 95%CI was 88.7%.
Conclusion:
The varicella vaccine produced by Changchun keygen biological products co., Ltd. was safe and effective.
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