<p>Herpes Zoster Following Covaxin Receipt</p>

Oumer Abdu Muhie,¹ Haylemariam Adera,¹ Eyob Tsige,¹ Aschalew Afework²

¹Department of Internal Medicine, GAMBY Teaching General Hospital, Bahir Dar, Ethiopia; ²Department of Public Health, GAMBY Teaching General Hospital, Bahir Dar, Ethiopia

Correspondence: Oumer Abdu Muhie Tel +251 921638680
Email [email protected]

Background: Herpes zoster is a reactivation of varicella zoster virus infection. We presented this case since it occurred after the receipt of Covaxin vaccine. There are few case reports of herpes zoster after the receipt of COVID-19 vaccine in the literature.
Case Presentation: We presented a case of herpes zoster in a 72-year-old lady after she received the first dose of the vaccine for COVID-19. She had post-herpetic neuralgia.
Conclusion: It is evident that VZV reactivation is one of the untoward events of the COVID-19 vaccine. However, it is wise to do large epidemiologic studies to check how common herpes zoster is after the receipt of COVID-19 vaccine.

Keywords: herpes zoster, vaccine, COVID-19, Ethiopia

Background

Coronavirus disease (COVID-19) is a pandemic that affects multiple systems. It may present with a wide spectrum of cutaneous manifestations. Among the cutaneous manifestations: widespread urticarial, erythematous rash, and chicken pox-like lesions are mentioned.¹ Currently, there are commercially available vaccines that are deployed to prevent COVID-19 disease and viral transmission. There are at least eleven vaccines for COVID-19 disease.²

Until June 4, 2021, a total of 272,285 confirmed COVID-19 cases and 4185 deaths due to COVID-19 were reported to WHO in Ethiopia. Regarding vaccination with COVID-19, as of 30 May 2021, a total of 1,813,739 vaccine doses have been administered.³ Currently, the COVAXIN and Sino pharm vaccine are available in Ethiopia in limited numbers.

Varicella zoster virus (VZV) will remain latent in the dorsal root or cranial nerve ganglia after initial acquisition. Herpes zoster is caused by the reactivation of VZV. It may occur spontaneously or be triggered by immunosuppression, trauma, stress, or fever.

Case Presentation

A 72-year-old female lady who was otherwise healthy presented to our outpatient department with a complaint of left lateral chest pain. She received COVAXIN vaccine a month before her presentation. A week after the receipt of the vaccine, she witnessed a rash on the left lateral chest that had not crossed the midline. There was not much pain initially, but subsequently she started to have pain in the same area. She has no known chronic medical disease. She was not taking any medication that could potentially suppress her immunity. She had no trauma to her chest.

Upon physical examination, she was worried about the chest pain, otherwise she was stable. Her BP was 110/70 mmHg, PR was 86 per minute. Chest examination was normal. She has a healed herpetic scar on the left T4 dermatome (shown in Figure 1).

Figure 1 Healed herpetic scar at T4 dermatome.

During the investigation, we found the fasting blood sugar (FBS) to be 85 mg/dl; her HIV antibody test was nonreactive. Similarly, Rapid Plasma Reagin (RPR, syphilitic test) was negative. Her creatinine was 0.9 mg/dl and chest radiography was normal.

With the above information, we diagnosed her with herpes zoster with post-herpetic neuralgia.

She was given analgesics and discharged with reassurance.

Discussion

After the COVID-19 pandemic, VZV reactivation in immunocompetent cases during COVID-19 infection has also been documented,^4–6 which is believed to develop as a consequence of COVID-19-induced lymphopenia and functional impairment of CD4+ T cells.^7,8 The median time to development of herpes zoster after COVID-19 diagnosis was reported to be 5.5 days.⁶ In our case, the herpetic rash appeared after seven days of vaccine receipt. There are a couple of case reports mentioning the occurrences of herpes zoster after receipt of COVID-19 vaccine.^9–13 However, we could not retrieve literatures describing herpes zoster following Covaxin vaccine from PubMed till November 18, 2021.

As mentioned earlier, there were reports of herpes zoster after COVID-19 vaccination.^9–13 The postulated mechanism predisposing for the reactivation of VZV after vaccination was immunomodulation.¹⁴ On the other hand, transient lymphopenia following COVID-19 vaccine (similar to VZV reactivation in COVID-19 disease) looks the possible reason for VZV reactivation after the receipt of the vaccine.⁹ Taking our case and the cases reported by other authors,^9–12,15 one can draw a link between COVID-19 vaccine and reactivation of VZV and thus herpes zoster.

Conclusion

Generally, the incidence of herpes zoster increases with age. Nevertheless, taking all the case reports about herpes zoster occurrences after receipt of COVID-19 vaccine, it is evident that VZV reactivation is one of the untoward events of the vaccine. However, it is wise to do large epidemiologic studies to check how common herpes zoster is after the receipt of COVID-19 vaccine.

Abbreviations

COVID-19, Corona Virus disease 19; RPR, Rapid plasma reagin; VZV, varicella zoster virus; WHO, World Health Organization.

Data Sharing Statement

All important data are included in the manuscript.

Ethics and Consent

Ethical approval was obtained from GAMBY Medical and Business College review board to publish the case details. Ethics approval and consent to participate: written informed consent was obtained from the case. Written informed consent was obtained from the patient for publication of this case report and any accompanying images.

Author Contributions

All authors made a significant contribution to the work reported, whether that is in the conception, study design, execution, acquisition of data, analysis and interpretation, or in all these areas; took part in drafting, revising or critically reviewing the article; gave final approval of the version to be published; have agreed on the journal to which the article has been submitted; and agree to be accountable for all aspects of the work.

Funding

The authors received no financial support for this case report.

Disclosure

The authors report no conflicts of interest in this work.

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