It is not worth pursuing, unfortunately. Tinnitus is a recognized secondary complication to shingles and chickenpox. The live virus in Zostavax could cause shingles, so you think you could link the two. Unfortunately, the federal Multi District Litigation (MDL) judge issued what is called a “Lone Pine Order” saying that plaintiffs must produce evidence that they took a PCR Test (Polymerase Chain Reaction) - which is able to differentiate between naturally occurring shingles and vaccine induced shingles.
Since the manufacturer never warned about this connection (vaccine, causing the very thing it was supposed to prevent), there was literally no reason for anyone to take a PCR test at the time they discovered they had problems.
If you did not have those contemporaneous PCR test results when you first had a problem, you could not make a claim, or if you had made a claim, it was dismissed. so there is no federal litigation ongoing, and if you filed in federal court, you would be dismissed quickly and very likely sanctioned.
It’s been a few years since I looked at it, and there were some individual state litigations ongoing, but it is hardly worth researching.
Which sucks. Thanks big pharma.