@gary_alderson ya LYMErix in 1992.
Its too bad, Lyme is such a potentially debilitating disease that not having a vaccine is tragic.
As someone who lives in the New England the threat of tick bites and Lyme is a constant fear when going outside or interacting with dogs.
I understand it is also a very complex bacteria that often mutates to evade the immune system, making a vaccine more challenging.
Fingers crossed they crack that nut in the near future.