We see allergic tendencies much more common in children than adults, and nobody really knows exactly why that is. The reality is, we can't quite understand the aging process of the immune system, but it seems to change.  -   David Kahn     Quotes
We see allergic tendencies much more common in children than adults, and nobody really knows exactly why that is. The reality is, we can't quite understand the aging process of the immune system, but it seems to change. David Kahn
 Adults