Looking at the situation with twenty-twenty hindsight, one sees that there was something out of the ordinary going on along the New England coast beginning in 1968. The Cape Cod and Long Island area had been hit by unusual spotted fever rickettsia cases that couldn’t be detected by conventional tests … In short, there were multiple, virulent, uncommon diseases in a small area, all transmitted by ticks.

Bitten, by Kris Newby, p. 193