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Study on the dynamics of specific antibodies and the mechanism of related immunity in SARS-CoV-2 infected individuals (COVID-19)

Study on the dynamics of specific antibodies and the mechanism of humoral and cellular immunity in different types of SARS-CoV-2 infected individuals

Status
Recruiting
Phases
Early Phase 1
Study type
Observational
Source
ChiCTR
Registry ID
ChiCTR2100045810
Enrollment
Unknown
Registered
2021-04-25
Start date
2020-05-01
Completion date
Unknown
Last updated
2021-12-13

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

Conditions

Novel Coronavirus Pneumonia (COVID-19)

Interventions

immunization group:immunization with inactivated SARS-CoV-2 vaccine

Sponsors

The Fifth mMedical Center, Chinese PLA General Hospital, Beijing, China
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to 65 Years

Inclusion criteria

Inclusion criteria: 1. The inclusion criteria were as follows: 80-100 convalescent COVID-19 patients with normal body temperature and negative SARS-CoV-2 RNA 1 week before vaccination, aged between 18 and 65 years and the ratio of male gender to female gender was about 1:1. 2. The serum of convalescent volunteers was collected and the titer of neutralizing antibody was determined. The volunteers with neutralizing antibody titer less than 1:96 were enrolled in booster immunization group.

Exclusion criteria

Exclusion criteria: Patients with chronic severe underlying diseases, or patients who do not understand or may not comply with the test requirements.

Design outcomes

Primary

MeasureTime frame
SARS-CoV-2 virus neutralizing antibody in serum;RBD antibody titer;

Secondary

MeasureTime frame
specific T cell immune response to virus antigens;changes in subsets of immune cells;

Countries

China

Contacts

Public ContactJingmin Zhao

The Fifth Medical Center, Chinese PLA General Hospital

jmzhao302@163.com+86 13521778570

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Feb 7, 2026