As one who has had 69 years of respiratory problems, stemming from asthma, allergies, and chronic bronchitis as a teenager and young adult, I'm particularly concerned about the vaccines' potential for making my conditions worse. (I also have hypertension and peripheral neuropathy but those don't seem to be major contraindications for the vaccine.)
"Vaccine-associated enhanced respiratory disease" sounds like exactly the kind of thing I very much do NOT want to run into.