共 32 条
[1]
Centers for Disease Control and Prevention, COVID data tracker: US COVID-19 weekly case rate per 100,000, by state/territory
[2]
Centers for Disease Control and Prevention, 2021, WORLD HEALTH ORG
[3]
Peripheral Oxygen Saturation in Older Persons Wearing Nonmedical Face Masks in Community Settings
[J].
JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION,
2020, 324 (22)
:2323-2324
[8]
Factors Associated with Cloth Face Covering Use Among Adults During the COVID-19 Pandemic - United States, April and May 2020
[J].
MMWR-MORBIDITY AND MORTALITY WEEKLY REPORT,
2020, 69 (28)
:933-937
[10]
Francescani copyC, 2020, ABC NEWS