@danaludwig To this very day CDC tells people to wear respirators for wildfire smoke but won't for covid
https://twitter.com/CDCEnviron...
@danaludwig直到今天，CDC告诉人们在野火烟雾中佩戴呼吸器，但在新冠肺炎中不会
https://twitter.com/CDCEnviron...
@danaludwig To this very day CDC tells people to wear respirators for wildfire smoke but won't for covid
https://twitter.com/CDCEnviron...
@danaludwig直到今天，CDC告诉人们在野火烟雾中佩戴呼吸器，但在新冠肺炎中不会
https://twitter.com/CDCEnviron...