My 21-year-old daughter works at a Pilates place & is behind the counter in a separate room. Even so, I am guessing air from the exercise area circulates throughout the facility. She is compromised due to MS (gets an infusion that makes her more susceptible to respiratory viruses) but was ready to go back there next week wearing a mask. a bad idea based on what we know now about indoor airflow and prolonged exposure? Appreciate any advice.