It's apparently harmful to humans according to the can. A wasp is blocking my front door and I've been sitting my car for almost an hour preparing to fight this thing. Everytime I go close to the door it faces towards me and flaps it's wings. I've been attacked by a full wasp hive before and I'm not trying to do that again. It's just one wasp but I saw another one flying around the car but not by the door.
bigupboy made it inside. Got my dad to spray it with some random insect killer that probably doesn't kill wasps (he was already inside) and the wasp flew at me and I ran back in the car. Waited 10 seconds and dipped towards the door.