defend (against); prevent (something)

a restroom, a toilet, a lavatory, a bathroom

purifying water at the entrance of a shrine; bathroom, restroom

hand washing, washing one's hands / washing by hand, as opposed to machine washing / a restroom, a toilet, a lavatory, a bathroom

to forget / (auxiliary verb, after the continuative form of a verb) to forget to …

infection, contagion

to become infected, to catch

forget oneself / be beside oneself

Spread of infection, such as a cold or sexually transmitted infection, amongst members living together.

(medicine) oral infection; oral transmission