UW Health is looking for 75 people to test a new Lyme disease vaccine that targets more strains of the tick-borne illness than a little-used shot taken off the market more than 20 years ago.

The Madison health care provider just became a site for an international phase 3 study of the vaccine, started last year by Pfizer and the French biotech company Valneva. People ages 5 and older can be in the study, which involves three shots over five months and a booster dose a year later. Half will get the vaccine and half will get fake injections, to see if those immunized get fewer infections.

Researchers are seeking outdoorsy types, not computer nerds.

“We want people who have dogs, and their dogs find ticks, and they’re out in the woods on the weekend, or they hunt,” said Dr. Robert Striker, an infectious disease specialist heading up the UW Health portion of the study. “We don’t want to sign up people who never go outside.”