Fresh. Sources for your quotations please?
I can't imagine peanut butter makes dust but nuts can. My son's friend had a very severe allergy and, as I said, didn't go into anaphylaxis but had a bad reaction. I imagine the little cracks and crevices below airline seats Harbour quite a collection which small fingers found. After that the poor child was strapped in firmly!
Re why allergies are more common now. Lots of research going on but two comments. Not too many years ago many children didn't make it to adulthood dying of measles or similar many of them may have had over reactive immune systems - this I was told by our immunologist.
Secondly it has always existed as I've said before there is a cave drawing in ancient Egypt of a pharaoh dying after a bee sting. Death certificates in the past often said "seizure" or "apoplexy" all sorts of vague terms which would be more specific today.
Here are a couple of quotes from medicine.net.com:
The first documented case of presumed anaphylaxis occurred in 2641 BC when Menes, an Egyptian pharaoh, died mysteriously following a wasp or <a class="break-all" href="http://www.medicinenet.com/insect_sting_allergies/article.htm" rel="nofollow" target="_blank">hornet sting</a>. Later, in Babylonian times, there are two distinct references to deaths due to wasp stings.
Charles Richet was awarded the Nobel Prize in 1913 for his work on anaphylaxis.
Not new....