[rrrrrrrrrrrryan]

The side effects were real and occurred frequently enough to make vaccinating the entire population a net-negative. Lyme disease is still extremely rare in most areas.

What should have happened is the vaccine should've been made prescribable by doctors to patients who live in areas where Lyme disease is common. Despite its side effects, the vaccine would have been hugely beneficial to specific areas of the U.S., but IIRC there wasn't a regulatory pathway at the time for this sort of limited approval based on geography.