I react but not as badly to European wasps.
I had 6 months of immunology treatment which has hopefully helped but I was meant to keep going for 5 years but it was killing me pumping myself full of venom every week.
I have always swelled up when stung by wasps but nothing too severe until a decade or so ago. I was driving a 4x4 along the beach on Fraser Island when a massive wasp (3+ cm long) somehow came through the ventilation system and stung me on the arm. I got a hard lump the size of half a golf ball which went away over a week and I thought no more about it.
A few weeks later I was working at home alone and I was putting a ladder back into the garage and I bumped a small paper wasp nest that I hadn't seen and I got stung about 20 times on my shoulder and neck. They are fecking painful and after swatting them off, killing a few with my hand and swearing vigorously I went into the house to get insect spray to kill the rest. I then sprayed the small nest and ran for it to avoid getting stung again and after about 5 steps felt a bit odd. I sat down on the steps for a minute then felt fine. Stood up and rapidly didn't feel fine. I then realised I was going unconscious and tried to roll onto my side on the grass as I went down. Then went fully out.
I was then unconscious for an unknown length of time before my son's mate from across the road saw me. Came over, prodded me with his foot and then ran off to tell his folks. He had a bit of form for tall tales so his folks didn't immediately believe him but after a while did and came over, found me and called the ambulance. After the ambulance arrived I started to come round a bit (not sure if they gave me anything or if I just came round) at which time I tried to stand up quite a lot and they had to almost sit on me to stop me. At this point my wife and son came home and her first thought was that I'd had a heart attack, because her friend's husband had dropped dead the week before. It quickly became apparent I wasn't dead but my eyes were totally bloodshot and my breathing was slightly impacted (airways were fine) and I still groggily REALLY wanted to stand up. An ambulance ride with added saline and I was fine. A hour's nap at emergency, where my wife took the opportunity to post a picture of me unconscious to Facebook, and they sent me home.
The diagnosis was that the stings had stimulated the vagus nerve and that I was dehydrated due to working in the summer sun.
A week later my wife was telling our neighbor about it, who was a nurse at the main NSW allergy treatment center at Westmead Hospital, and she flagged that the registrar at emergency was almost certainly wrong and that I'd suffered an anaphylactic event and these events tend to escalate so I could die next time. The clinic confirmed and I then had the immunology treatment which involved them pumping ever increasingly large quantities of venom into me every week to train my body not to react. Makes you feel like shit and very achy, which is why I stopped after the inpatient part as I was written off for every weekend.
Stripy paper wasp bastards