A Clinical Trial of Immuno-bridging Between Different Manufacture Scales of Recombinant COVID-19 Vaccine (Sf9 Cell)

This is a randomized, double-blind , non-inferiority design study, to evaluate the Immunogenicity bridging between different manufacture scales of Recombinant COVID-19 Vaccine (Sf9 Cell) in healthy population aged 18-59 years with vaccination course 0, 21, 42 days. 892 subjects aged 18-59 years are recruited and randomly inoculated in a 1:1 ratio from a pilot or commercial batch of Recombinant COVID-19 Vaccine (Sf9 Cell).