If that is true, then why are all the nurses at the drive through testing areas wearing masks? Why do we see cancer patients and people with seriously compromised immune systems wearing masks long before this disease? I will put my money on believing that while a mask might not be 100%... it is some percent better than not wearing one.
From the American Cancer Society website:
”Avoid large crowds of people such as at schools, travel, shopping, social events, and public gatherings. If you have to be around a crowd, it's a good idea to wear a mask.“
Learn about the risk of infection in people getting cancer treatment, including symptoms to watch for and ways to lower the risk of infection.
www.cancer.org