UArizona Professors Rank Most Effective Masks to Protect Against COVID-19

Dr. Koenraad Van-Doorslaer, PhD, an assistant professor of virology and immunobiology at the College of Medicine – Tucson, says the most effective mask is the N95, usually reserved for healthcare workers, followed by the KN95. "Regardless of what type of mask people are wearing, I think it's important that we wear something," Van-Doorslaer said.