Fecal oral route important to be aware of for health, not just covid, everyday good health. That's why wash your hands when using public restroom. If there is a microscopic amount of poop on the hand of a previous user of the restroom, and they touch a door handle, any and all people who touch the handle later can pick it up on their hand, then wipe their face, it ends up in the mouth and can transmit disease.
Very important at home, too. Keep the bathroom fixtures clean, the toilet flusher handle, water controls, light switch door knob, cabinet pulls, etc.