A Study to Learn More About Prevenar 20 Once it is Out in the Korean Market

Korean Post-marketing Surveillance for Prevenar 20

The purpose of this study is to understand the safety of Prevenar 20 (Pneumococcal 20-valent conjugate vaccine) once it is out in the Korean market. Prevenar 20 will be given to participants aged 6 weeks or older in Republic of Korea.

This study is seeking for participants who are:

• Infant, children and adolescents aged 6 weeks to under 18 years or adult who are 18 years or older
• Prescribed Prevenar 20 by their physician as per approved product label

All participants in this study will receive Prevenar 20 vaccine.

1 dose (0.5 mL) of Prevenar 20 will be given into a muscle, preferably to the shoulder muscle.

We will look at the experiences of people receiving the study medicine. This will help us see if the study medicine is safe.

Participants will take part in this study for 28 days. During this time, study doctor collects the data of subjects to understand the safety of study medicine. There is no strict fixed visit schedule. If subjects are unable to visit the study clinic 28 days after Prevenar 20 vaccine was given then the safety information will be collected by telephone or e-mail.

Study Overview

• Status: Recruiting
• Conditions: Safety; Pneumococcal Immunization
• Intervention / Treatment: Biological: Pneumococcal 20-valent conjugate vaccine

Detailed Description

The study design will reflect the actual management of subjects in routine clinical practice. The study will be performed by continuous registration method. Investigators enroll subjects who receive Prevenar 20 (Pneumococcal 20-valent conjugate vaccine) for the first time after the start of the study.

Data can be collected at routine scheduled and/or unscheduled visits. There is no mandatory fixed visit schedule. Investigator collects the data of subjects from the time of the subject's first dose of study drug to a minimum of 28 days following administration of study drug, to evaluate the safety of study drug and records the information in each subject's Case Report Form.

As no additional visits or tests are required for this study, the data specified in this protocol may not be collected from all subjects.

Endpoint

• Frequency and proportion of solicited systemic reactions occurring from Day 1 through Day 7 after vaccination, where Day 1 is the day of vaccination.
• Frequency and proportion of solicited local reactions occurring from Day 1 through Day 10 days after vaccination, where Day 1 is the day of vaccination.
• Frequency and proportion of Adverse Events (AEs), Adverse Drug Reactions (ADRs), Serious Adverse Events (SAEs), Serious Adverse Drug Reactions (SADRs), Unexpected AEs, Unexpected ADRs, Unexpected SAEs, and Unexpected SADRs throughout the surveillance period

• Frequency and proportion of Adverse Events Special Interest (AESI) throughout the surveillance period

  • Invasive Pneumococcal Disease

All assessments are performed as part of normal clinical practice or standard practice guidelines for the subject population and healthcare provider specialty in the countries where this non-interventional study is being conducted.

• Study Type: Observational
• Enrollment (Estimated): 660

Contacts and Locations

• Study Contact: Name: Pfizer CT.gov Call Center; Phone Number: 1-800-718-1021; Email: ClinicalTrials.gov_Inquiries@pfizer.com

Study Locations

• South Korea
  • Seoul, South Korea
    • Recruiting
    • Pfizer Korea

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Child; Adult; Older Adult
• Accepts Healthy Volunteers: Yes

• Sampling Method: Non-Probability Sample

Study Population

The study population for this study is subjects aged 6 weeks or older who are determined to be administered Pneumococcal 20-valent conjugate vaccine according to the approved indications in routine clinical practice in Republic of Korea.

Description

Inclusion Criteria:

Subjects must meet all of the following inclusion criteria to be eligible for inclusion in the study:

1. Infant, children and adolescents who are aged 6 weeks to under 18 years or adult who are 18 years or older
2. Subjects who have been prescribed Prevenar 20 by their physician as per approved product label
3. Evidence of a personally signed and dated informed consent document indicating that the subject or their parent(s)/legal guardian, if applicable, have been informed of all pertinent aspects of the study

Exclusion Criteria:

Subjects meeting any of the following criteria will not be included in the study:

1. Subjects with contraindication according to approved label of Prevernar 20 (Pneumococcal 20-valent conjugate vaccine)
2. Any subjects (or a legally acceptable representative) who do not agree that Pfizer and companies working with Pfizer use his/her information

Study Plan

How is the study designed?

Number of groups / cohorts

1

Cohorts and Interventions

Group / Cohort	Intervention / Treatment
Pneumococcal 20-valent conjugate vaccine; Subjects aged 6 weeks or older who have been administered Pneumococcal 20-valent conjugate vaccine as per approved product label.	Biological: Pneumococcal 20-valent conjugate vaccine; For intramuscular use only. One dose (0.5 mL) of Pneumococcal 20-valent conjugate vaccine should be administered intramuscularly, preferably in the deltoid muscle, with care to avoid injection into or near nerves and blood vessels.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Frequency of solicited systemic reactions	The safety analysis set consists of all subjects who are prescribed Pneumococcal 20-valent conjugate vaccine by the investigator in the routine care, received at least one dose of Pneumococcal 20-valent conjugate vaccine according to the approved product label in Korea, and have at least one safety follow-up.	From Day 1 through Day 7 after vaccination, where Day 1 is the day of vaccination
Frequency of solicited local reactions	The safety analysis set consists of all subjects who are prescribed Pneumococcal 20-valent conjugate vaccine by the investigator in the routine care, received at least one dose of Pneumococcal 20-valent conjugate vaccine according to the approved product label in Korea, and have at least one safety follow-up.	From Day 1 through Day 10 after vaccination, where Day 1 is the day of vaccination
Frequency of Adverse Events (AEs)	The safety analysis set consists of all subjects who are prescribed Pneumococcal 20-valent conjugate vaccine by the investigator in the routine care, received at least one dose of Pneumococcal 20-valent conjugate vaccine according to the approved product label in Korea, and have at least one safety follow-up.	28 days after vaccination
Frequency of Adverse Events Special Interest (AESI)	The safety analysis set consists of all subjects who are prescribed Pneumococcal 20-valent conjugate vaccine by the investigator in the routine care, received at least one dose of Pneumococcal 20-valent conjugate vaccine according to the approved product label in Korea, and have at least one safety follow-up.	28 days after vaccination
Frequency of Adverse Drug Reactions (ADRs)	The safety analysis set consists of all subjects who are prescribed Pneumococcal 20-valent conjugate vaccine by the investigator in the routine care, received at least one dose of Pneumococcal 20-valent conjugate vaccine according to the approved product label in Korea, and have at least one safety follow-up.	28 days after vaccination
Frequency of Serious Adverse Events (SAEs)	The safety analysis set consists of all subjects who are prescribed Pneumococcal 20-valent conjugate vaccine by the investigator in the routine care, received at least one dose of Pneumococcal 20-valent conjugate vaccine according to the approved product label in Korea, and have at least one safety follow-up.	28 days after vaccination
Frequency of Serious Adverse Drug Reactions (SADRs)	The safety analysis set consists of all subjects who are prescribed Pneumococcal 20-valent conjugate vaccine by the investigator in the routine care, received at least one dose of Pneumococcal 20-valent conjugate vaccine according to the approved product label in Korea, and have at least one safety follow-up.	28 days after vaccination
Frequency of Unexpected AEs	The safety analysis set consists of all subjects who are prescribed Pneumococcal 20-valent conjugate vaccine by the investigator in the routine care, received at least one dose of Pneumococcal 20-valent conjugate vaccine according to the approved product label in Korea, and have at least one safety follow-up.	28 days after vaccination
Frequency of Unexpected ADRs	The safety analysis set consists of all subjects who are prescribed Pneumococcal 20-valent conjugate vaccine by the investigator in the routine care, received at least one dose of Pneumococcal 20-valent conjugate vaccine according to the approved product label in Korea, and have at least one safety follow-up.	28 days after vaccination
Frequency of Unexpected SAEs	The safety analysis set consists of all subjects who are prescribed Pneumococcal 20-valent conjugate vaccine by the investigator in the routine care, received at least one dose of Pneumococcal 20-valent conjugate vaccine according to the approved product label in Korea, and have at least one safety follow-up.	28 days after vaccination
Frequency of Unexpected SADRs	The safety analysis set consists of all subjects who are prescribed Pneumococcal 20-valent conjugate vaccine by the investigator in the routine care, received at least one dose of Pneumococcal 20-valent conjugate vaccine according to the approved product label in Korea, and have at least one safety follow-up.	28 days after vaccination

Collaborators and Investigators

• Sponsor: Pfizer
• Investigators: Study Director: Pfizer CT.gov Call Center, Pfizer

Publications and helpful links

Helpful Links

• To obtain contact information for a study center near you, click here.

Study record dates

Study Major Dates

• Study Start (Actual): November 13, 2025
• Primary Completion (Estimated): March 1, 2027
• Study Completion (Estimated): March 1, 2027

Study Registration Dates

• First Submitted: December 29, 2024
• First Submitted That Met QC Criteria: December 29, 2024
• First Posted (Actual): January 6, 2025

Study Record Updates

• Last Update Posted (Actual): March 12, 2026
• Last Update Submitted That Met QC Criteria: March 10, 2026
• Last Verified: March 1, 2026

More Information

Terms related to this study

• Other Study ID Numbers: B7471038

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO
• IPD Plan Description: Pfizer will provide access to individual de-identified participant data and related study documents (e.g. protocol, Statistical Analysis Plan (SAP), Clinical Study Report (CSR)) upon request from qualified researchers, and subject to certain criteria, conditions, and exceptions. Further details on Pfizer's data sharing criteria and process for requesting access can be found at: https://www.pfizer.com/science/clinical_trials/trial_data_and_results/data_requests.

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No