I lived in NYC for just under 8 years, and I don't think I noticed being bitten by a mosquito even once. There just aren't that many mosquitos in NYC.
When I go back home to Minnesota, I notice being bitten when I'm out in the wilderness, even though I no longer have an immune reaction to the bites.
Though, I suppose it's possible that NYC has some species of mosquito that is less attracted to the head and doesn't buzz in the ears so much, and bites more subtly than the mosquitos in Minnesota or Texas.
When I go back home to Minnesota, I notice being bitten when I'm out in the wilderness, even though I no longer have an immune reaction to the bites.
Though, I suppose it's possible that NYC has some species of mosquito that is less attracted to the head and doesn't buzz in the ears so much, and bites more subtly than the mosquitos in Minnesota or Texas.