4 ms·
Simple Respiratory Mask[1] [1] Emerg Infect Dis. 2006 Jun; 12(6): 1033–1034. doi: 10.3201/eid1206.051468 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC33730
by boshomi 7y ago
Simple Respiratory Mask[1]
[1] Emerg Infect Dis. 2006 Jun; 12(6): 1033–1034.
doi: 10.3201/eid1206.051468
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3373043/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3373043/