I actually had Lyme disease when i was younger. Curiously enough, i didn't get the somewhat common rash after the tick bite, but instead it was discovered later, as a part of blood testing. I was submitted to that after my relatives had concerns about how lethargic i was being, as well as because i was experiencing joint pain, which the blood test later seemed to confirm.

If i recall correctly, i was given antibiotics and felt pretty bad for a month onwards, though nowadays i'm not aware of any lingering long term effects, apart from maybe my short term memory being slightly worse than i'd expect it to. Of course, i think that in my case i had it pretty easy, since some other folks are known to develop symptoms that are considerably more worse. Whether there will be any lingering consequences in my future because of it, only time will tell.

A vaccine would definitely be welcome, especially because of how common ticks are here in Eastern Europe - any walk in the forest might end with more than one of them on your clothes. If you have dogs, you'll probably have to remove dozens of those from their fur every summer.