When one makes a claim that they have some sort of "deathly illness/allergy" then it would be in the carrier's interest to ensure she had medical clearance.....she stepped on a turd and they left it up to her to scrape her shoe off.
Deliciously ironic.....
Did she have an Epi-pen in her purse? Pretty irresponsible to walk around civilization knowing you may be stricken with your life threatening allergy and not have the proper medication to stop it.