Association of COVID-19 infection and COVID-19 vaccination with idiopathic sudden sensorineural hearing loss in Malaysia: a case-control study.

Background: Previous studies indicated that the SARS-CoV-2 virus and COVID-19 vaccines may contribute to idiopathic sudden sensorineural hearing loss (ISSNHL). This nationwide study sought to evaluate the correlation between COVID-19 infection and vaccination with ISSNHL.

Methods: This case-control study analysed samples from adults aged 18 years and older who visited the otorhinolaryngology department in 32 government hospitals in Malaysia for pure tone audiometry(PTA) between January 25, 2020 and June 30, 2022.