So i just figured out the other day that i am immune to bee venom.  The other day i was driving to home from work and a bee flew into my car, i swatted, it stung me in the arm, then left out the window at about 75mph.  It hurt a little bit but it was more like itching than stinging or throbbing.  So i get home to see this massive red bump about the size of a dime already formed around the sting.  In the center was a small black dot, the stinger, which i carefully removed with my Jegs digital read-out micrometer... i couldnt find tweezers.   
About 20min later i looked at it again and it seemed to have a small yellowing dot forming abournd where the stinger was.  It didnt hurt to touch and even press on.  So curious to see if what was forming would come out, i kinda squeezed on the sting bump.  Low and behold, a small small drop of yellowish translucent fluid seeped out which i took to be the venom form the sting.  30min later, the bump was gone and i had only but a small red dot on my arm like i had been pricked with a clothes pin.   
So in 1 hours time, i had gotten stung, swelled up, my body appearently told the venom to fuck off, and the swelling had gone away.  So in closing, the bee died while i only lost 1hp for about an hour.