OP 17 December, 2020 - 07:58 AM
More than 100,000 face masks have hit the market. They come in a variety of colors, designs and materials. They are a pandemic necessity. But what they don’t come with is a label that says how well they block infectious particles — a fundamental omission that has frustrated public health officials.
That could soon change, however. A set of federal standards for minimum filter efficiency and labels indicating which products meet them are being developed for the bewildering marketplace for masks and other face coverings.
https://www.nytimes.com/live/2020/12/16/...n-find-out
That could soon change, however. A set of federal standards for minimum filter efficiency and labels indicating which products meet them are being developed for the bewildering marketplace for masks and other face coverings.
https://www.nytimes.com/live/2020/12/16/...n-find-out