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Evaluation of the protective efficacy of the single dose Influenza Virus Vector COVID-19 Vaccine for Intranasal Spray in adults aged 18 years and over with a mixed immune background of COVID-19 vaccine immunization history and COVID-19 breakthrough infection history: a randomized, open, blank controlled real world study

Study on the protective effect of single dose Influenza Virus Vector COVID-19 Vaccine for Intranasal Spray in adult population with mixed immune background

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ChiCTR
Registry ID
ChiCTR2300072316
Enrollment
Unknown
Registered
2023-06-09
Start date
2023-06-10
Completion date
Unknown
Last updated
2023-06-18

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

Conditions

Diseases caused by the novel coronavirus infection

Interventions

Intervention group:The intervention group was inoculated with Influenza Virus Vector COVID-19 Vaccine for Intranasal Spray
Control group:blank

Sponsors

Yancheng Center for Disease Prevention and Control
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Inclusion criteria

Inclusion criteria: 1) At the time of enrollment, the age was = 18 years old. 2) Able and willing to comply with the requirements of the research protocol and sign an informed consent form. 3) Those who are healthy or have underlying chronic diseases but are in a stable state (those who have stable drug control or volunteers who have not been hospitalized or changed in treatment measures due to this disease within the past two months, as determined by the researchers and recorded). 4) It is 3 months or more from the previous COVID-19 infection (or never infected), and 6 months or more from the previous COVID-19 vaccine immunization interval.

Exclusion criteria

Exclusion criteria: 1) At the time of enrollment, there were suspected symptoms of acute COVID-19/influenza, such as dry throat, sore throat, cough, etc. 2) Fever, axillary temperature>37.0 ?. 3) Individuals with a history of severe allergies (such as acute allergic reactions, angioneurotic edema, breathing difficulties, etc.) or known or suspected to have a history of severe allergies to the research vaccine and one of its components. 4) Pregnant or lactating women. 5) HIV infection, tuberculosis, immune deficiency caused by illness or long-term medication use. 6) Uncontrolled epilepsy and other progressive nervous system disease (such as transverse myelitis, Guillain Barre syndrome, demyelinating diseases, etc. 7) According to the judgment of the investigator, volunteers are not suitable for other situations in this study.

Design outcomes

Primary

MeasureTime frame
The incidence of COVID-19 endpoint cases at least 14 days (= 15 days) after vaccination;

Secondary

MeasureTime frame
The incidence of severe and above COVID-19 endpoint cases at least 14 days (= 15 days) after vaccination;Serious adverse events (SAE) throughout the entire study period (approximately 6 months after enrollment);

Countries

China

Contacts

Public ContactZhang Hongjun

Yancheng Center for Disease Prevention and Control

289742009@qq.com+86 153 5155 0190

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Feb 4, 2026