So, per the CDC there are 7-8K poisonous snake bites in the US annually but very few fatalities - only 5 in 2015. Bites are pretty rare and I suspect that most of the time the bites aren't life threatening and don't make the news. (E.g. I got bit by a copperhead while walking in a field but it didn't inject much venom, which I understand is typical for copperheads. I was young and healthy and my leg swelled up and hurt a lot but I didn't need any anti-venom.) In the grand picture of things to worry about snakes should be way down on your list. They aren't looking for trouble and will do everything they can to leave you alone. Just keep your eyes open and try not to to step on one by accident