|LETTER TO THE EDITOR
|Year : 2022 | Volume
| Issue : 4 | Page : 613
New COVID-19 vaccine, thiomerosol, and reversible cerebral vasoconstriction
Rujittika Mungmunpuntipantip1, Viroj Wiwanitkit2
1 Private Academic Consultant, Bangkok, Thailand
2 Department of Community Medicine, Dr. DY Patil University, Pune, Maharashtra, India
|Date of Submission||29-May-2021|
|Date of Decision||09-Jul-2021|
|Date of Acceptance||30-Jul-2021|
|Date of Web Publication||07-Mar-2022|
Private Academic Consultant, Bangkok
Source of Support: None, Conflict of Interest: None
|How to cite this article:|
Mungmunpuntipantip R, Wiwanitkit V. New COVID-19 vaccine, thiomerosol, and reversible cerebral vasoconstriction. Med J DY Patil Vidyapeeth 2022;15:613
|How to cite this URL:|
Mungmunpuntipantip R, Wiwanitkit V. New COVID-19 vaccine, thiomerosol, and reversible cerebral vasoconstriction. Med J DY Patil Vidyapeeth [serial online] 2022 [cited 2022 Jul 5];15:613. Available from: https://www.mjdrdypv.org/text.asp?2022/15/4/613/339182
COVID-19 vaccine is the hope for containment of COVID-19 pandemic. In preventive medicine, the vaccination is the best primary prevention of infectious disease. The new COVID-19 vaccine usually receives a registration certificate under emergency rules adopted during the COVID-19 pandemic, and there are limited data on efficacy and adverse effect of the new vaccine. Different COVID-19 vaccines might have different efficacies and adverse effects.
Focusing on the possible adverse effect of COVID-19 vaccine, there are some reports on neurological problems after COVID-19 vaccination. A reversible cerebral vasoconstriction might be observed in some persons receiving inactivated COVID-19 vaccine. The reversible cerebral vasoconstriction is a rare adverse effect of some vaccines such as measles vaccine. For a noninactivated COVID-19 vaccine, it might induce viscosity change and result in a thrombohemostatic disorder. Coagulation risk with the adenoviral vector vaccines is also related to induction of antibody to platelet factor 4. Nevertheless, the pathogenesis of neurological deficit due to inactivated COVID-19 vaccine is unknown.
Regarding the adverse effect due to COVID-19 vaccine, a component of the vaccine might play an important role. In a recent study, the component of COVID-19 vaccine is associated with an allergic adverse effect. Regarding inactivated vaccine, thimerosal is a component that might be related to adverse effect. Thimerosal is a mercury compound used as a composition of inactivated COVID-19 vaccine. It can cause allergic-like reaction at skin. The vasoconstriction effect of thimerosal is also reported, and it might be associated with reversible cerebral vasoconstriction after inactivated COVID-19 vaccination. Further studies on this issue are recommended.
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Conflicts of interest
There are no conflicts of interest.
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