I've had the full set of vax doses despite never having covid. The initial dose brought on tinnitus that wasn't obvious until the first dose in April 2021. Prednisone helped after waiting 2 weeks before taking. However, no increase in tinnitus between 2nd and next to last dose. The last bivalent dose in Sep. 2022 brought it back at the same level as the initial dose. In defense of the vax, I already had moderate hearing loss starting 2-3 years before the outbreak of the pandemic. But the tinnitus, unfortunately, seems permanent.