I dont know how many ticks I have pulled off of me, thousands I would bet. As for ones that are latched on, maybe a hundred. My deer hunting land is loaded in ticks, and loaded with deer ticks. Most years I treat my dogs with Frontline April through September, but this year when I went up on April 1st, I thought they may be out, but I doubt very many, well I was very wrong, I have been pulling them off the dogs since. I had contacted lymes during the November deer hunting season in northern Wisconsin one year. It latched on on the back of my head, at the edge of the hairline. I found the small tick and I figured it couldnt have been on very long, when I pulled it off, the head wasnt on the tick, and we dug for it, but never found it. Well the area started to get very sore to the touch after about a week, I couldnt tell if there was a bulls eye or not, because it was in my hair. Shortly after I got back home from deer hunting, I started noticing body aches, and a headache that wouldnt go away. I thought of the tick bite right away, so I went into the dr, and told them my symptoms, and about the tick, they just said we can test you, but we can prescribe the antibiotics with out the test, so that was the route I went. Within a couple weeks, my symptoms were gone. But to this day, I still get body aches, and headaches for no reason, and somedays to the point it is hard to function normally.
Now I take prevention much more seriously. I make sure my dogs get their lymes shots, and I typically dont let other family and friends in the woods during the months of late April through mid June unless needed, then we all spray down, and check ourselves thoroughly when we come back in.