The trial will enroll 474 children aged 12 months to 12 years and will compare Varicella-Z directly with Merck & Co.’s Varivax, a well-established varicella vaccine. This head-to-head evaluation is designed to objectively assess the competitive strength of Varicella-Z in the global market.

The two-dose varicella vaccination schedule is the global standard, with more than 28 countries, including the United States, Canada, and Japan, recommending it to prevent breakthrough infections. GC Green Cross aims to complete the trial by the second half of 2027 and plans to seek regulatory approval in Southeast Asia, with a focus on Thailand. The company also intends to submit a similar IND application in Vietnam before the end of the year.
“This clinical trial represents a critical milestone in establishing the scientific foundation for the two-dose regimen of Varicella-Z,” said Jae-Woo Lee, head of GC Green Cross’s development division. “We are committed to ensuring our vaccine meets global standards of competitiveness.”
Kim Kuk Ju, HEALTH IN NEWS TEAM
press@hinews.co.kr