The CDC report might lead health authorities to accelerate the research and approval of a Lyme vaccine. Promising results were found earlier this year on one vaccine under development. That would be a popular item in prime Lyme disease territory, largely the Northeast and northern Midwest states where up to 30% of deer ticks carry the infection. Almost all cases of the disease — 96% -- occur in 13 states.

California isn’t among them, and one reason for that is that we have, in a sense, our own little natural vaccine program going. In this state, nymphal ticks’ favorite host is the common western fence lizard, which has a protein in it blood that kills the bacterium responsible for Lyme. As a result, few adult ticks are carriers.