Nurses, carehome workers, paramedics, doctors, receptionists, cleaners, hotel porters, policemen, ticket inspectors, dustmen, road sweeps, priests, teachers, lecturers, students, waiters, shop assistants, salesmen, masseurs, dentists, gym staff, leisure centre employees, job centre staff, social workers, pet shop employees, physios, factory workers, farmers, gardeners.
Anyone who touches anyone else. Anyone who handles money. Anyone who works in a confined space. Anyone who works in an outdoor environment. Anyone who works with the public. They are all exposed to germs on a daily basis.
Very, very few of them wash and change their clothes before entering the supermarket. And you know what? We're fine.
Humans are pretty robust, and germs crop up in the unlikeliest places. There are 10 times as many germs on a train seat than a toilet seat. There's no need for hysteria.