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Popular title: Clinical study of Omicron BA.4/5-Delta strain recombinant novel coronavirus protein vaccine (CHO cells). Purpose of the study: Main objectives: To evaluate the immunogenicity and safety of Omicron BA.4/5-Delta strain recombinant novel coronavirus protein vaccine (CHO cells) against the new coronavirus prototype strain and Omicron variant (XBB, BA.5, BF.7) after receiving 2 doses according to different immunization schedules in people aged 18 years and older. Secondary purposes: To evaluate the immune persistence of Omicron BA.4/5-Delta recombinant novel coronavirus protein vaccine (CHO cells) against the new coronavirus prototype strain and Omicron variant (XBB, BA.5, BF.7) after receiving 2 doses according to different immunization schedules in people aged 18 years and older. Overall design: Studies were randomized, double-blind, active-controlled study design. Study group: There were 160 participants aged 18 years and older, including 80 people aged 60 years and older. Study group:Among them, 80 subjects were from the "randomized, double-blind, active-controlled clinical study to evaluate the immunogenicity and safety of Omicron BA.4/5-Delta strain recombinant novel coronavirus protein vaccine (CHO cells) in people aged 18 years and older, protocol number: LKM-2023-NCV-02", 40 cases in the study group and 40 cases in the control group, and completed the second dose of vaccine at the 6th month visit to observe immunogenicity and safety. The remaining 80 subjects were randomly blinded to the 1:1 ratio into the research group and the control group and received 2 doses of the experimental vaccine according to the 0-1-month procedure to observe immunogenicity and safety.


Clinical Trial Description

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Study Design


Related Conditions & MeSH terms


NCT number NCT06025812
Study type Interventional
Source Anhui Zhifei Longcom Biologic Pharmacy Co., Ltd.
Contact Xie Hai Tang
Phone 0553-5738350
Email xiehaitang@sina.com
Status Not yet recruiting
Phase N/A
Start date September 20, 2023
Completion date June 30, 2024

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