国家队出征了。 The US Department of Health and Human Services has committed to buy 500 million N95 masks or respirators over the next year and a half in order to support domestic manufacturers, and build up the Strategic National Stockpile, the country's reserve of medical supplies for public health emergencies.
The US Department of Health and Human Services has committed to buy 500 million N95 masks or respirators over the next year and a half in order to support domestic manufacturers, and build up the Strategic National Stockpile, the country's reserve of medical supplies for public health emergencies.
https://www.cnn.com/2020/03/06/business/medical-masks-china-shortage-suppliers/index.html