How could me wearing a face shield help protect me from catching the virus? It'd be mostly useless; although obviously as mentioned it'd stop me touching my face as much as normal.
This is all about containing the spread.
Although I suppose in hindsight that explains why people were downvoting me.
You ARE the person in the faceshield (I assume you meant that instead of facemask), you don't control what other people do so assume they uncovered. The smoke is in the air, it can reach you. Will it get around that shield or not?