Clinical trial NCT04701788: A Clinical Trial to Evaluate the Immunogenicity and Safety of PPV23 Vaccine Revaccinations in the Elderly
Official title: A Phase Ⅳ Clinical Trial to Evaluate the Immunogenicity and Safety of 23-valent Pneumococcal Polysaccharide Vaccine Revaccinations in the Elderly
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE4
Conditions: Vaccination
Lead sponsor: China National Biotec Group Company Limited
Sponsor class: INDUSTRY
Collaborators: name: Sichuan Center for Disease Control and Prevention
First posted: 2021-01-08
Enrollment: 331
Sex: ALL
Minimum age (years): 60
Maximum age (years): 65
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: NON_RANDOMIZED
Intervention model: PARALLEL
Intervention model description: Study group is PPV23 revaccination and control group PPV23-vaccination.
Primary purpose: PREVENTION

Brief summary: To evaluate the the immunogenicity and safety of 23-valent pneumococcal polysaccharide vaccine revaccinations in the elderly

Detailed description: 1. Antibody double growth rate in 28-40 days after immunization;
2. Antibody GMC level in 28-40days after immunization;
3. Incidence of adverse reactions in 0-30days.

Eligibility criteria: Inclusion Criteria:

1.The age was 60-65 years old on the day of enrollment;2.The subjects have signed the informed consent and signed the date;3.The subjects are able to participate in all planned follow-up visits and were able to follow all trial procedures (e.g. complete diary card / contact card, return to visit);4.The subjects in the study group had been vaccinated with 23 valent pneumococcal polysaccharide vaccine made in China for more than 5 years; 5.The control group had never been vaccinated with any pneumococcal vaccine; 6.Axillary temperature ≤37.0℃.

Exclusion Criteria:

1.With a medical history with hypersensitiveness, eclampsia, epilepsy, cerebropathia and neurological illness; 2.Allergic to any ingredient of vaccine or with allergy history to any vaccine; 3.Subjects with immunodeficency or suspected impairment of immunologic function (e.g. caused by HIV), or subjects are in the process of immunosuppressor therapy(Taking orally injecting of steroid hormone); 4.Administration of immunoglobulins within 30 days prior to this study; 5.Acute febrile disease(temperature ≥ 37.0°C) or infectious disease; 6.With a clearly diagnosed history of thrombocytopenia or other coagulopathy, may cause contraindications for subcutaneous injection; 7.With any serious chronic illness, acute infectious diseases, or respiratory diseases; 8.Suffering from serious cardiovascular diseases (pulmonary heart disease, pulmonary edema, hypertension can not be controlled to normal by drugs), liver and kidney diseases, diabetes with complications;9.With any kind of infectious, purulent, or allergic skin diseases; 10.With any other factor that makes the investigator determines the subject is unsuitable for this study.

Primary outcomes:
measure: 2-fold growth rate of antibody
timeFrame: The blood collection time was 28-40 days after vaccination.
Secondary outcomes:
measure: Antibody GMC level
timeFrame: The blood collection time was 28-40 days after vaccination.
measure: Incidence of adverse reactions
timeFrame: Within 30 days after vaccination.
Other outcomes:
Locations:
city: Chengdu
country: China
facility: Sichuan Center for Disease Control and Prevention
state: Sichuan
Study officials:
affiliation: Sichuan Center for Disease Control and Prevention
name: Qianli Ma
role: STUDY_DIRECTOR
References: