But when it comes to wearing these masks to accomplish what scientists call “source control,” a vent negates the entire purpose. Face masks such as those recommended by the CDC provide a small ...

“The purpose of masks is to keep respiratory droplets from reaching others to aid with source control. Masks with one-way valves or vents allow exhaled air to be expelled out through holes in ...

Masks function very differently as personal protective equipment (PPE) versus source control. This means that nearly any kind of simple cloth mask is great for source control. The mask creates ...

Cloth masks act as “source control” to block virus particles exhaled by the wearer and provide “filtration for personal protection” by blocking incoming infectious droplets from others ...

The community use of masks for source control is a “public good”: something we all contribute to that eventually benefits everyone—but only if almost everyone contributes, which can be a ...

“Compelling evidence now supports the benefits of cloth face masks for both source control (to protect others) and, to a lesser extent, protection of the wearer,” the CDC’s Margaret ...

"Compelling evidence now supports the benefits of cloth face masks for both source control (to protect others) and, to a lesser extent, protection of the wearer," the report states. Other measures ...

Cloth masks don’t provide great source control, either. The CDC is now letting people who test positive for COVID-19 stop isolating after five days and then wear a mask for five days.

Of all the three-word phrases this pandemic has popularized — “flatten the curve,” “six feet apart” — perhaps none has resonated as deeply as “wear a mask.” (Or, as Marco Rubio ...

Masks may be more effective as a “source control” because they can prevent larger expelled droplets from evaporating into smaller droplets that can travel farther. Another factor to remember, noted ...

you need to wear it with your mask." The Centers for Disease Control and Prevention has given similar guidance. "It is not known if face shields provide any benefit as source control to protect ...

He said masks function very differently as personal protective equipment versus “source control.” "Masks are very good at blocking larger droplets and not nearly as good at blocking tiny ...