It may be a stretch but when CHAZ became CHOP, I thought of this: Children's Hospital of Philadelphia (CHOP). This is the hospital where Dr. Paul Offit (Off-it?) holds sway regarding vaccines. He is described as "Director of the Vaccine Education Center". Since MDs generally know virtually nothing about vaccines (not even the ingredients, only the CDC 'schedule') I found the existence of a vaccine education center startling.
https://www.chop.edu/doctors/offit-paul-a