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The Impact of the Fourth Dose of Inactivated Vaccine Against SARS-CoV-2 on Immune Response

The Impact of the Fourth Dose of Inactivated Vaccine Against SARS-CoV-2 on Immune Response

Status
Recruiting
Phases
Early Phase 1
Study type
Observational
Source
ChiCTR
Registry ID
ChiCTR2200055564
Enrollment
Unknown
Registered
2022-01-12
Start date
2022-01-12
Completion date
Unknown
Last updated
2023-02-06

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Coronavirus Disease 2019 (COVID-19)

Interventions

case series:Nil

Sponsors

First Affiliated Hospital, Sun Yat-sen University
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to 59 Years

Inclusion criteria

Inclusion criteria: 1. Participants aged 18-59 years old; 2. Participants who had finished the third dose of inactivated vaccine against SARS-CoV-2 ((BBIBP-CorV) more than 6 months.

Exclusion criteria

Exclusion criteria: 1. Those who are allergic to any component of the vaccine, and those who have history of severe allergic reactions to the vaccine, such as acute allergic reactions, urticaria, skin eczema, dyspnea, angioedema or abdominal pain; 2. Those with fever or those who suffer from acute diseases or severe chronic diseases in the acute stage of onset; 3. Pregnant women, lactating women, or having a pregnancy plan within 3 months; 4. Patients with a history or family history of convulsions, epilepsy, encephalopathy or mental illness; Patients with uncontrolled epilepsy and other progressive neurological diseases; Patients with a history of Guillain-Barré syndrome; 5. Those who have been diagnosed with congenital or acquired immunodeficiency HIV infected lymphoma leukemia or other autoimmune diseases; 6. Those who have severe respiratory diseases, severe cardiovascular diseases, liver and kidney diseases and malignant tumors; 7. A history of COVID-19 infection; 8. Patients who take medicine affecting the immune function, such as immunosuppressant agents or immunopotentiators or glucocorticoids ( >= 10 mg prednisone or other equivalent glucocorticoids) within one month before enrollment; 9. Those who are considered unsuitable for vaccination by clinicians.

Design outcomes

Primary

MeasureTime frame
SARS-CoV-2 RBD antibodies;Immunocell phenotype;Adverse events;pseudotype virus antibody neutralisation assay;

Countries

China

Contacts

Public ContactPeng Sui

First Affiliated Hospital, Sun Yat-sen University

pengsui@vip.163.com+86 13660652577

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Feb 12, 2026