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Published on: August 24, 2015
Long-term effects of Pfizer-BioNTech COVID-19 vaccinations on platelets
Yuqi Zhou1, Masako Nishikawa2, Hiroshi Kanno1
1Department of Chemistry, The University of Tokyo, Tokyo, Japan.
Insights
Concerns about COVID-19 vaccines and platelet function are global. This study found no significant long-term effects of the Pfizer-BioNTech vaccine on platelet aggregation in healthy individuals.
Area of Science:
- Immunology
- Hematology
- Vaccinology
Background:
- Global concern exists regarding COVID-19 vaccines' impact on platelet function.
- Long-term effects of COVID-19 vaccination on platelet activity are not well understood.
Purpose of the Study:
- To investigate the long-term effects of multiple Pfizer-BioNTech (BNT162b2) vaccine doses on platelet aggregation and related parameters.
- To address safety concerns about COVID-19 vaccines concerning platelet function.
Main Methods:
- Utilized image-based single-cell profiling for detailed analysis.
- Employed temporal monitoring of circulating platelet aggregates.
- Studied healthy human subjects over a nearly one-year period, before and after vaccination.
Main Results:
- No significant or persistent trends in platelet aggregation were observed post-vaccination.
- Vaccination showed insignificant effects on platelet turnover and activation.
- Platelet-leukocyte interactions remained unaffected in the long term.
Conclusions:
- The Pfizer-BioNTech COVID-19 vaccine does not appear to cause significant long-term alterations in platelet aggregation or related functions.
- Findings suggest minimal impact of vaccination on platelet dynamics and immune cell interactions.
Abstract:
There is a global concern about the safety of COVID-19 vaccines associated with platelet function. However, their long-term effects on overall platelet activity remain poorly understood. Here we address this problem by image-based single-cell profiling and temporal monitoring of circulating platelet aggregates in the blood of healthy human subjects, before and after they received multiple Pfizer-BioNTech (BNT162b2) vaccine doses over a time span of nearly 1 year. Results show no significant or persisting platelet aggregation trends following the vaccine doses, indicating that any effects of vaccinations on platelet turnover, platelet activation, platelet aggregation, and platelet-leukocyte interaction was insignificant.
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