don’t know what kind of wasps we have in MD but they never bother me….Yellowjackets? I had the misfortune of running over on old exposed root in my side yard, unbeknownst to me those little jerks had a nest in there….I got hit about 7 times before I even realize what was happening, lucky I’m not allergic….usually I’m a live and let live type but I sprayed that nest out of existence….