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The Corona19 virus spreads mainly through the droplets of infected people. However, not a cough or a sneeze, but a few words, thousands of small droplets popped out, and especially those who have confirmed symptoms or suspected symptoms, cotton masks have limitations in preventing virus transmission.

Reporter Nam Joo-hyun.

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A research team at the National Institutes of Health in the United States used a laser meter and a high-speed camera to see how much droplets bounce when a person speaks.

In 0.0165 seconds, 360 fine droplets that were invisible came out and thousands of droplets were released into the air with a simple greeting saying, "Goodbye."

If you are infected with Corona19, these droplets may contain viruses.

There is a good reason to be sure to wear a mask or refrain from talking or talking on the phone in an enclosed space like an elevator.

Domestic studies have also shown that wearing a cotton mask or dental mask when the patient coughs has limitations in preventing the spread of the virus.

A team of Asan Medical Center in Seoul confirmed the amount of virus discharge when coughing after putting two types of masks on four patients with Corona19, but both cases were less than those without a mask, but a significant amount of virus was released.

When coughing, the mask is lifted slightly, and the droplets are leaking up and down.

[Kim Sung-han / Professor of Infectious Diseases, Seoul Asan Hospital: KF94, a high-efficiency mask, may be appropriate for suspected or confirmed patients who cough and sneeze a lot. .]

Corona19 It is important to wear a health mask for people who have confirmed or suspected symptoms.

(Video coverage: used, video editing: Hojin Kim)