On increased hygiene to the point of obsession… As the human body needs to interact with a variety of micro-organisms, viruses and similar to function properly there is perhaps too much 1st world concern with what is in the air we breathe. Sure I don’t want to breathe in some viruses, bacteria, fungi but OTT behaviour can be just as harmful to our well-being.
If someone has obsessive concern about what they breathe or touch in the toilet facilities, then what is in environment around them such as the dust when they step inside or outside any structure or take a breath anywhere, the particles/matter they contact and ingest when they garden, the particles/matter present when they fill up their car, when they go to the Drs or hospitals, when they eat at a restaurant, the contaminants when they touch money or hand cards to other people, when they eat any food, drink any water bar perhaps freshly distilled water from a sealed and gamma irradiated container, really when they use anything it can fill them with such dread they refuse all contact with anything. Some “bathe” themselves in such “cleanliness” they actually compromise their own health and make themselves more susceptible to contracting diseases/infections by reducing the effectiveness of their body’s immune system.
Certainly washing hands and drying them properly before consuming food or after toileting, using a mask when they have the Flu or other airborne infections or when the infections are in high concentration around them (eg Flu season in a busy area) are sensible precautions to take.