NBC News: "The World Health Organization is examining rare reports of hearing loss and other auditory issues following Covid-19 vaccinations.
In a newsletter posted on its website, the international public health agency said that it has been made aware of sudden hearing problems, particularly tinnitus, or ringing of the ears, that may be associated with Covid vaccines."
Supporting Publication: Assessment of Sudden Sensorineural Hearing Loss After COVID-19 Vaccination (Eric J. Formeister, MD, MS1; Matthew J. Wu, BS2; Divya A. Chari, MD3; et al)
View Publication: https://jamanetwork.com/journals/jamaotolaryngology/fullarticle/2789496
Additional Sources:
National Post: https://nationalpost.com/health/who-pfizer-vaccine-potentially-linked-to-hearing-loss