Impermeable Spray On Mesh
Could it be that there are some types of materials that could be sprayed on to the skin - all over, everywhere - that could keep the virus out? The ideal material would be non-toxic, almost invisible, would allow for free movement. Perhaps it would naturally degrade after 12 hours (requiring reapplication) but would not have to be removed. I envision a booth somewhat like the airline scanning that would spray the whole body at one time.
A materials engineer could assist greatly in this idea.