What most naturally follows?

How to disinfect public surfaces
Don't directly touch surfaces.
Cars, buses, subways, and the like are potentially dirty places, often housing germs on upholstered seats, flooring, and railings which thousands of human hands have touched.
Consider standing whenever possible, or sitting on a newspaper or other disposable object.
Instead of grabbing onto handrails with one's hands, wrap a clothing-clad arm around the pole to keep hands clean. The danger with this, of course, is slipping and losing your balance should the transport stop quickly.