Recent clinical and laboratory studies have shown that cloth masks or face coverings can provide an extra layer of protect to prevent respiratory and aerosol droplets from traveling through the air to other people.

Researchers are studying the effectiveness of various kinds of mask in preventing virus transmission.

CDC doesn’t recommend masks with exhalation valves or vents, which permit exhaled respiratory droplets to escape through the opening. N-95 respirators are considered critical supplies and should be reserved only for healthcare workers and medical responders.

Instructions to make cloth masks are available on the CDC website. Try several types of masks to find which is most comfortable for you.

The information was taken from PHA site: https://phassociation.org/covid-19-faq-for-the-pulmonary-hypertension-community/#continue