Jul 31, 2020 · The COVID-19 outbreak in China, which produces half of the world’s face masks, has generated a twofold challenge: there is surging domestic demand and a major disruption to the global supply. It is estimated that 89 million medical masks will be required every month and a 40% increase in manufacturing is expected to meet the global demand [ 3 ].
- Dongxiao Ji, Li Fan, Xiaoxia Li, Seeram Ramakrishna
Nov 15, 2021 · We assessed the prevalence and correlates of mask usage during the pandemic. Methods We examined a total of 13,723,810 responses to a daily cross-sectional online survey in 38 countries of people who completed from April 23, 2020 to October 31, 2020 and reported having been in public at least once during the last 7 days.
- Elena Badillo-Goicoechea, Ting-Hsuan Chang, Esther Kim, Sarah LaRocca, Katherine Morris, Xiaoyi Deng...
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Jun 16, 2021 · despite demonstrated biologic efficacy and official recommendations from the centers of disease control and prevention, 1–4 there has been wide variability in state-level policies for mask wearing while in public to reduce covid-19 transmission. 5, 6 a survey conducted by the delphi group suggested a strong state-level correlation between mask …
Nonpharmaceutical interventions such as mask wearing play a critical role in reducing disease prevalence. Under the dueling dynamics of mask wearing and disease, we observe a robust nonmonotonic relationship between the attack rate (i.e., the fraction of the ever-infected population) and the transmission probability of the disease.
Jun 23, 2021 · References Figure. Seven-Day Moving Average of COVID-19 Cases, Hospitalizations, and Deaths per 100 000 Population in Mask and No Mask Counties in Kansas View LargeDownload Dashed lines in panel A represent associations confounded by the November mask mandate. Table.
- Donna K Ginther, Donna K Ginther, Carlos Zambrana
Clearly, this doesn’t prove that not wearing masks prevents transmission. Another CDC-highlighted study, by Rader et al., invited people across the country to answer a survey. The low (11 percent) response rate—including about twice as many women as men—indicated that the mix of respondents was hardly random.