Water and hydrocloric acid in our stomachs.
The most moral and non-offensive term would be a “Resident of (Name of home or place)”, resident in a personal care home(or some other term for a care home), and sometimes a Patient- but only if the patient is living in a medical care home, like part of a hospital for example. Awkwardly explained, but I hope you understand!
C) Animal vector; Lyme disease ( it's spread by animals or bugs )
B) Direct contact; Staphylococcus ( could get it from touching someone that has it )
A) Sexual contact; Human papilloma virus
Good luck! (:
