Monitoring side effects of COVID-19 vaccines worldwide

COVID-19 Vaccines Safety Tracking: Global Consortium Study

Observational Masaryk University · NCT04834869

This study is tracking the side effects of COVID-19 vaccines in healthcare workers, older adults, and schoolteachers to see how common they are and if certain factors affect them.

Quick facts

Study typeObservational
Enrollment30000 (estimated)
Ages18 Years and up
SexAll
SponsorMasaryk University Academic / other
Locations14 sites (Philadelphia, Pennsylvania and 13 other locations)
Trial IDNCT04834869 on ClinicalTrials.gov

What this trial studies

This project actively tracks the side effects of COVID-19 vaccines among healthcare workers, older adults, and schoolteachers. It aims to estimate the prevalence of local and systemic side effects, evaluate demographic and medical risk factors, and assess long-term consequences of vaccination. Additionally, the study compares the safety of different COVID-19 vaccines and examines the impact of palliative medications on short-term side effects. The findings will contribute to public health efforts to improve vaccine uptake and address vaccine hesitancy.

Who should consider this trial

Good fit: Ideal candidates include healthcare workers, older adults over 65, and schoolteachers who have received a COVID-19 vaccine.

Not a fit: Patients who are not healthcare workers, older adults, or schoolteachers and have not received a COVID-19 vaccine will not benefit from this study.

Why it matters

Potential benefit: If successful, this study could enhance understanding of vaccine safety and improve public confidence in COVID-19 vaccination.

How similar studies have performed: Other studies have successfully monitored vaccine safety, making this approach both relevant and necessary in the current context.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* HCW, OA and ST who received COVID-19 vaccine.
* Participating subjects should be at least 18-year-old and able to give their informed consent independently.

Exclusion Criteria:

* Non HCW, OA and ST who received the COVID-19.

Where this trial is running

Philadelphia, Pennsylvania and 13 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Adverse Reaction to VaccineCOVID19 VaccineCOVID-19VaccinesSafetySide Effects
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.