This is what our allergist said. Living in Australia wife and I are both asian both eat peanuts. No peanut allergies in either families. Wife ate peanuts while pregnant but son has peanut allergy.
Or that there's something unusual about simply being in Australia as an infant that causes peanut sensitivity?
Or that infants in Australia have less exposure to nuts?
And I've no known allergies.
OK, but why now and not when I was a kid growing up in Australia?
We have to get to the root cause of this new problem. (Read my other posts here.)