Tweet from ZekeEmanuel at January 03, 2022 at 02:37PM
I tell all of my students: Cotton and surgical masks do not cut it!
Only N95s, KN95s, and KF94s have sufficient filtration and seal well enough around the face.
https://t.co/ZUjpfQ4mYP— Zeke Emanuel (@ZekeEmanuel)
Jan 3, 2022
from http://twitter.com/ZekeEmanuel