Eligibility Module

Eligibility Module

The Eligibility Module contains detailed information about who can participate in the clinical trial. This includes eligibility criteria, age restrictions, gender requirements, healthy volunteer status, and study population descriptions, helping researchers understand who is eligible to participate in the study.

Eligibility Module path is as follows:

Study -> Protocol Section -> Eligibility Module

Eligibility Module


Ignite Creation Date: 2025-12-24 @ 11:43 PM
Ignite Modification Date: 2025-12-24 @ 11:43 PM
NCT ID: NCT04143451
Eligibility Criteria: Inclusion Criteria: 1. Recruited subjects include subjects ≥50 years or adult subjects ≥18 years with chronic illness attending GOPD or SOPD in HKWC. 2. All subjects/ next of kin give written informed consent. 3. Subjects must be available to complete the study and comply with study procedures. Willingness to allow for serum samples to be stored beyond the study period, for potential additional future testing to better characterize immune response. Exclusion Criteria: 1. Inability to comprehend and to follow all required study procedures. 2. Have a recent history (documented, confirmed or suspected) of a flu-like disease within a week of vaccination. 3. Have a known allergy to eggs or other components of the study vaccines (including gelatin, formaldehyde, octoxinol, thimerosal, and chicken protein), or history of any anaphylaxis, serious vaccine reactions, to any excipients. 4. Have an active neoplastic disease or a history of active hematologic malignancy. 4\. Have a history of receiving immunoglobulin or other blood product within the 3 months prior to vaccination in this study. 6\. Have known active human immunodeficiency virus (HIV) infection. 7. Received an agent on clinical trial (vaccine, drug, device, blood product, or medication) within 1 month prior to vaccination in this study or expect to receive an experimental agent during this study. Unwilling to refuse participation in another clinical study through the end of this study. 8\. Tympanic temperature ≥ 38°C within 3 days of intended study vaccination 9. Have a history of alcohol or drug abuse in the last 5 years. 10. Have a history of Guillain-Barré Syndrome. 11. Pregnant during the study period. 12. Have any condition that the investigator believes may interfere with successful completion of the study.
Healthy Volunteers: False
Sex: ALL
Minimum Age: 18 Years
Study: NCT04143451
Study Brief:
Protocol Section: NCT04143451