Someone I know is highly allergic to pineapple; eating more than a few bites could easily cause her to suffocate to death without intervention. She didn't real

Someone I know is highly allergic to pineapple; eating more than a few bites could easily cause her to suffocate to death without intervention. She didn't realize this for years because she only ate canned pineapple, which doesn't affect her at all. One day she had dried (but not cooked) pineapple and went to bed; fortunately she didn't like the taste and only had a bite or two because she woke up swollen and having a hard time breathing. After that, she was still able to eat canned pineapple without any problems. Whatever it is that causes the reaction must be broken down for good by heating the pineapple to canning temperatures.