Subject: Why do some people seem more prone to ticks and chiggers?

My wife and I can go out in the woods together, wearing the same type of 
clothing and using the same repellants, yet she will come home with far 
more ticks and chiggers on her arms and legs as I. I just seems that some 
people are more prone to these parasites. Is it a biochemical matter? Are 
there any indications that one person rather than another would be more 
susceptible to these insects?

Re: Why do some people seem more prone to ticks and chiggers?