Immunogenicity，Safety and Cross - Immune Response With Mutant Strains of a Third Dose of an Inactivated COVID-19 Vaccine

Sinovac

Status and phase: Active, not recruiting; Phase 4

Conditions: COVID-19

Treatments: Biological: Inactivated COVID-19 Vaccine

Study type: Interventional

Funder types: Industry

Identifiers

NCT05329038

PRO-nCOV-MA4009-SD

Details and patient eligibility

About

This is a phase Ⅳ follow-up clinical trial based on the previous Phase Ⅳ clinical trial of an inactivated COVID-19 vaccine (CoronaVac) manufactured by Sinovac Life Sciences Co., Ltd.The purpose of this study is to evaluate the immunogenicity,safety and cross-immune response of booster immunization using COVID-19 vaccine,to compare the similarities and differences of immune responses between primary immunization and booster immunization and to detect antibody against hepatitis A and evaluate the immune persistence of the one dose immunization schedule of hepatitis A vaccine in healthy population aged 18 years and older.

Full description

This study is a phase 4 clinical trial to evaluate the immunogenicity,safety and cross-immune response of booster immunization using COVID-19 vaccine，to compare the similarities and differences of immune responses between primary immunization and booster immunization and to detect antibody against hepatitis A and evaluate the immune persistence of the one dose immunization schedule of hepatitis A vaccine in healthy population aged 18 years and older. The experimental vaccine is manufactured by Sinovac Life Sciences Co., Ltd.. A total of 180 healthy subjects received two dose of inactivated COVID-19 vaccine (CoronaVac) based on primary immunization in previous Phase Ⅳ clinical trial will be enrolled, including 90 adults aged 18-59 years and 90 elderly elderly aged 60 years and older.Subjects in each age group will receive the booster immunization of CoronaVac(the third dose) and will be collected blood sample before booster immunization and 14 days after booster immunization.

Enrollment: 180 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Participated in the clinical studies on the safety and immunogenicity of Inactivated COVID-19 Vaccine combined immunization with 23-valent pneumococcal polysaccharide vaccine in Rushan city, Shandong Province from July to October 2021;
• The interval between complete immunization with two doses of COVID-19 vaccine is 6-8 months;
• Subjects will be willing to participate in the study and follow the study procedure to collect venous blood;
• Proven legal identity;

Exclusion criteria

• History of asthma, history of allergy to the vaccine or vaccine components,or serious adverse reactions to the vaccine, such as urticaria, dyspnea,and angioedema;
• Severe neurological disease (epilepsy, convulsions or convulsions) or mental illness;
• Fever at the time of vaccination, or acute onset of chronic disease, or uncontrolled severe chronic disease, or acute disease;
• Pregnancy or lactation;
• Receipt of attenuated live vaccines in the past 14 days;
• Receipt of inactivated or subunit vaccines in the past 7 days
• According to the investigator's judgment, the subject has any other factors that are not suitable for participating in the clinical trial.

Trial design

Primary purpose: Prevention

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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180 participants in 2 patient groups

Adult group

Experimental group

Description:

90 subjects aged 18-59 years received two dose inactivated COVID-19 vaccine in primary immunization will receive the booster immunization (the third dose )of inactivated COVID-19 vaccine.

Treatment:

Biological: Inactivated COVID-19 Vaccine

Elderly group

Experimental group

Description:

90 elderly aged 60 year and older received two dose inactivated COVID-19 vaccine in primary immunization will receive the booster immunization (the third dose )of inactivated COVID-19 vaccine.

Treatment:

Biological: Inactivated COVID-19 Vaccine