JSL
Congrats on anafillactique!!
If you will, just spread the word about people with allergies. You are so right that you do not want a medical emergency at FL350.
Neither does the PAX in question.
Nuts have raised awareness, but I believe that there still is no reservation code for a Pax with a fish allergy, whereas if you are nut allergic or pig allergic (Jewish, Islam or no doubt others) you can have a code.
Seems to me to be a small missing element.