[Alex3917]

> Lyme disease accounts for about 80 percent of the tick-borne illnesses in the U.S.

I mean how would we actually know that though if we don't even know what all the tickborne illnesses are, and if there is no test for many of them?

[DennisP]

They probably mean the known tickborne illnesses. When illnesses are unknown it's often because they're rare, so it's probably a good estimate.

In any case, Lyme disease is very common and on that basis alone, a vaccine would prevent a lot of suffering, regardless of what other suffering remains in place.