高速摄像视频 | 口罩是如何减缓新冠肺炎传播的？

6月11日，美国国家标准技术研究所（National Institute of Standards and Technology, NIST）发布了一个视频，通过高速摄像技术拍摄了口罩（包括面巾）是如何减缓COVID-19疾病传播的。随后，美国国家卫生研究院（NIH）也在官方推特转发，宣传“科学戴口罩，减缓新冠传播，人人有责”（Cover smart. Do your part. Slow the spread）。

视频字幕：

Note: This high-speed visualization illustrates airflow when breathing and coughing. It does NOT show movements of virus particles.

注意:这个高速视频可视化的演示了呼吸和咳嗽时的气流，演示的不是病毒颗粒的运动。

NO FACE COVERING talking and coughing未戴面部遮盖物：说话和咳嗽

The virus causing COVID-19 spreads mainly person to person through droplets emitted by infected people when they talk, cough, or sneeze.

COVID-19病毒主要通过感染者说话、咳嗽或打喷嚏时喷出的飞沫在人与人之间传播。

You can be infected and spread the virus but have no symptoms. (CDC.gov)

你可能被感染，在没有任何症状时传播病毒。(CDC.gov)

DOUBLE LAYER BANDANNA breathing双层手帕遮盖面部：呼吸

Wearing any face covering over your mouth and nose is better than none at all.

用任何东西遮盖口鼻，都比没有要好。

This protects others and may also protect you.

这样可以保护别人，也可能对你自己有保护。

LOOSE-FITTING COVERING breathing and coughing宽松的面部遮盖物：呼吸和咳嗽

A loose-fitting face covering or one worn below the nose is much less effective than one that fits snugly.

佩戴宽松的口罩或者将口罩戴在鼻子下面，与紧贴面部的口罩比，效果要差得多。

WELL-FITTING COVERING breathing紧密贴合的口罩：呼吸

A well –fitting, breathable face covering made with a few layers of tightly woven fabric protects best.

佩戴用几层紧密编织的织物制作的贴合的、透气口罩，保护效果最好。

Cover smart. Do your part. Slow the spread.

科学佩戴口罩，减缓疾病传播，人人有责。

视频拍摄者：Matthew Staymates是NIST的机械工程师和流体动力学家。

NIST官方推特

NIH官方推特