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Bell palsy incidence higher with SARS-CoV-2 infection than vaccine

Incidence of Bell palsy is significantly more common following severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection than after receipt of SARS-CoV-2 vaccinations, according to a review published online April 27 in JAMA Otolaryngology-Head & Neck Surgery.

Ali Rafati, M.D., from Iran University of Medical Sciences in Tehran, order vicodin online without a prescription and colleagues conducted a systematic literature review to compare the incidence of Bell palsy in people receiving COVID-19 vaccines versus unvaccinated individuals or placebo recipients.

The researchers found that when pooling data from four phase 3 randomized clinical trials, Bell palsy incidence was significantly higher in recipients of COVID-19 vaccines versus placebo recipients (77,525 vaccine recipients versus 66,682 placebo recipients; odds ratio [OR], 3.00; 95 percent confidence interval [CI], 1.10 to 8.18).

However, there was no significant increase seen in Bell palsy after administration of messenger RNA SARS-CoV-2 vaccines (eight studies; 13,518,026 doses versus 13,510,701 unvaccinated; OR, 0.70; 95 percent CI, 0.42 to 1.16). There was no significant difference in the incidence of Bell palsy among 22,978,880 first-dose recipients of the Pfizer/BioNTech vaccine versus 22,978,880 first-dose recipients of the Oxford/AstraZeneca vaccine (OR, 0.97; 95 percent CI, 0.82 to 1.15).

Furthermore, Bell palsy was significantly more common after SARS-CoV-2 infection (2,822,072) compared with after COVID-19 vaccinations (37,912,410; relative risk, 3.23; 95 percent CI, 1.57 to 6.62).

“This study shows evidence for the association between SARS-CoV-2 and Bell palsy; however, this finding does not equate to causality, and further research is required to verify this association and investigate possible mechanisms,” the authors write.

More information:
Ali Rafati et al, Association of SARS-CoV-2 Vaccination or Infection With Bell Palsy, JAMA Otolaryngology–Head & Neck Surgery (2023). DOI: 10.1001/jamaoto.2023.0160

Journal information:
JAMA Otolaryngology–Head & Neck Surgery

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