Hereditary illnesses, or causes that are uncontrollable like age
Ask them if they truly understand and keep up with them and stay in contact b
Aerobic. It is called aerobic fitness.
This contamination now allow the virus to move into another living medium (the one who actually ate the potato).
After the virus enter the eater's body, it will start to reproduce itself and caused several symtoms during the period where the antbodies inside the host's body is fighting it.