Q: I am having difficulty understanding how people can expose others to potential infection by a communicable disease by not wearing a mask or fact covering when they leave the house. Because of this, do you know if there are there any studies that show the most effective mask that I can wear? Thanks.
A: Duke University published results of a study they did. Following is a short summary.
Five Most Effective Masks
- Fitted N95 with no exhalation valve
- 3-layer surgical mask
- Cotton-polypropylene-cotton mask
- 2-layer polypropylene mask
- 2-layer cotton, pleated style mask (see full study for photos and specific design details of all masks tested. URL is below)
Three Least Effective Masks
- Gaiter-type neck fleece
- Double-layer bandana
- Knitted mask