Thrombosis After Adenovirus-Vectored COVID-19 Vaccination: A Concern on Underlying Illness
Dear Editor, we would like to share ideas on the publication “Effects of Thrombocytopenia and Thrombosis After Adenovirus-Vectored COVID-19 Vaccination.”1 Haimei noted that “According to current research results, we have known…. the reasons and mechanisms need to be further explored.”1 It is no doubt that adenovirus-vectored COVID-19 vaccination might induce thrombotic event. Haimei mentioned that there were many possible pathogenesis of COVID-19 vaccine induced thrombotic events.1 Additionally, the hyperviscosity induced by COVID-19 vaccination can superimpose the problem and trigger thrombotic event, especially for the vaccine recipient with underlying diseases or prior infection.2 Due to several factors, a thrombosis at heart, brain, lung or other organs might occur after COVID-19 vaccination. However, it should note that not all events are associated with vaccination. Sometimes, it might be difficult to finalize that a deadly thrombotic disorder that occurs after COVID-19 vaccination is directly caused by the vaccine or not. Here, the authors would like to share an interesting observation. A 72-year-old patients waiting for getting COVID-19 vaccination at a vaccination point developed sudden dyspnea. The medical personnel at vaccination unit observed the clinical problem, hence, referred this case to emergency unit and the patient was finally diagnosed to have a myocardial infarction. This patient has underlying poorly controlled diabetes, hypertension and dyslipidemia. Since she was a person at risk for getting COVID-19, she was included into the group for receiving COVID-19 vaccination according to local public health policies.
This clinical event occurred a few minutes before this patient would receive adenovirus-vectored COVID-19 vaccination. If the clinical problem occurs a few minutes late, it might be accused as a side effect of the COVID-19 vaccine. It is necessary to recognize that adenovirus-vectored COVID-19 vaccination is associated with thrombotic adverse effect and there are sporadic reports of the adverse events. However, it should restate that although pathological finding in case with thrombotic problems after vaccination can confirm the occurrence of thrombosis, it cannot definitively conclude that vaccine directly causes problems. In a recent report, post-COVID-19 vaccination acute myocardial infarction usually occurred within 24 h postvaccination.3 Nevertheless that report on six cases of post-COVID-19 vaccination acute myocardial infarction patients is also insufficient to make general conclusions.3 The present case occurring at very few minutes prior to COVID-19 vaccination is a good scenario implying that “not all post COVID-19 vaccination thrombotic event is caused by the vaccination”. Although this case may speculate that if some of the reported cases may mistakenly reported as vaccine adverse events, a general conclusion cannot be derived from the outcome of only one patient. While it is important to understand the rare thrombohemostatic events after COVID-19 vaccinations, it is also important to highlight that vaccinations are safe and effective and most powerful tools for the fight against COVID-19.
Declaration of Conflicting Interests
The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
Funding
The author(s) received no financial support for the research, authorship, and/or publication of this article.
ORCID iD
Rujittika Mungmunpuntipantip https://orcid.org/0000-0003-0078-7897
References
1. Haimei MA. Concern Abut the adverse effects of thrombocytopenia and thrombosis after adenovirus-vectored COVID-19 vaccination. Clin Appl Thromb Hemost. 2021 Jan-Dec;27:10760296211040110.
2. Joob B, Wiwanitkit V. Expected viscosity after COVID-19 vaccination, hyperviscosity and previous COVID-19. Clin Appl Thromb Hemost. 2021 Jan-Dec;27:10760296211020833.
3. Aye YN, Mai AS, Zhang A,. et al. Acute myocardial infarction and myocarditis following COVID-19 vaccination. QJM. 2021 Sep 29:hcab252.
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Article first published online: November 10, 2021
Issue published: January-December 2021
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© The Author(s) 2021.
This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (https://creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access page (https://us.sagepub.com/en-us/nam/open-access-at-sage).
PubMed: 34755555
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