Omicron BA.4/5-Delta COVID-19 Vaccine Phase I Clinical Trial

The purpose of this study is to evaluate the safety of Omicron BA.4/5-Delta strain recombinant novel coronavirus protein vaccine (CHO cells) after vaccination in people aged 18 and over. It is planned to screen 100 subjects who are 18 years old and above and more than 6 months since the last new coronavirus infection or new coronavirus vaccine. All subjects collected venous blood before vaccination, 14 days, 3 months, and 6 months after vaccination for immunological detection of neutralizing antibody of the new coronavirus prototype strain, Delta strain and Omicron strain (BA.4/5, XBB); All adverse events (AEs) within 30 minutes after vaccination, all AEs (including solicited and non-solicited AEs) on days 0-7, all AEs (non-solicited AEs) on days 8-30, and all AEs within 12 months after vaccination were collected. serious adverse events (SAE) and adverse events of special interest (AESI).

Solicitation AEs (the following events occurring within 7 days of vaccination): AESI: Select 100 cases of people aged 18 years and above and more than 6 months after the last new coronavirus infection or vaccination, and evaluate the effectiveness of Omicron BA.4/5-Delta strain recombinant new coronavirus protein vaccine (CHO cells) in people aged 18 years and above. Safety after vaccination in the population. Non-vaccination site (systemic) adverse events: fever, headache, fatigue/asthenia, nausea, vomiting, diarrhea, myalgia (non-vaccination site), cough, acute allergic reaction. Venous blood was collected from all subjects before vaccination, 14 days, 3 months, and 6 months after vaccination for immunological detection of neutralizing antibodies against the new coronavirus prototype strain, Delta strain, and Omicron strain (BA.4/5, XBB). Adverse events at the vaccination site (local): pain, swelling, induration, redness, rash, itching; Myocarditis/pericarditis, thrombosis, thrombocytopenia, etc., immune-related diseases (psoriasis, rheumatoid arthritis, etc.), nervous system-related diseases (Glibari syndrome, peripheral neuropathy, Bell's palsy). Pregnancy events that occurred within 12 months after vaccination of subjects in this trial were collected, and neonates whose pregnancy outcome was delivery during the study period were followed up for long-term safety (follow-up until 12 months after delivery). Immunogenicity observation: Safety observations: AEs, AESIs and SAEs: collect all adverse events (AEs) 30 minutes after vaccination, all AEs 0-7 days (including solicited and non-solicited AEs), 8-30 days all AEs (non-solicited AEs), vaccination All serious adverse events (SAEs) and adverse events of special interest (AESIs) within the last 12 months.