It can take several months for the Lyme blood test to come up positive. Since the tick that gives you Lyme is usually NOT the one you found, but rather the one that fed on you and then crawled away, anyone in our area could be infected with Lyme at any time. It would not be clinically reasonable to test everyone, so why test the person who found a tick? That said, I can send a blood test to look for Lyme, about 2 months after the tick was found, (at least 3 weeks later) if you would like.