Why Surgical Mask over N95?

In the study, the IOM recommended that the concurrent use of a surgical mask worn as an outer barrier, or a washable faceshield, could potentially extend the useful life of an N95 by acting as a physical barrier to potentially infectious liquids and droplets, as well as block larger particles (1).

Should I use a surgical masks or N95 respirators to protect against COVID-19?

No. Surgical masks and N95s need to be reserved for use by health care workers, first responders, and other frontline workers whose jobs put them at much greater risk of acquiring COVID-19. The cloth face coverings recommended by CDC are not surgical masks or N95 respirators. Surgical masks and N95s are critical supplies that must continue to be reserved for health care workers and other medical first responders, as recommended by CDC.

Does a surgical mask help avoid COVID-19?

If worn properly, a surgical mask is meant to help block large-particle droplets, splashes, sprays, or splatter that may contain germs (viruses and bacteria), keeping it from reaching your mouth and nose. Surgical masks may also help reduce exposure of your saliva and respiratory secretions to others.