The number of Google searches for "tinnitus vaccine" and the the number of #COVID19 #vaccinations/day are correlated. US data.
Tinnitus can be a symptom of cerebral venous sinus thrombosis (https://jamanetwork.com/journals/jamaneurology/fullarticle/1306263)
Tinnitus can be a symptom of cerebral venous sinus thrombosis (https://jamanetwork.com/journals/jamaneurology/fullarticle/1306263)