The DOI matches its Crossref record; 10 of the 10 references it cites were found in a registry or an index.
Community Use Of Face Masks And COVID-19: Evidence From A Natural Experiment Of State Mandates In The US: Study examines impact on COVID-19 growth rates associated with state government mandates requiring face mask use in public.
Abstract
State policies mandating public or community use of face masks or covers in mitigating the spread of coronavirus disease 2019 (COVID-19) are hotly contested. This study provides evidence from a natural experiment on the effects of state government mandates for face mask use in public issued by fifteen states plus Washington, D.C., between April 8 and May 15, 2020. The research design is an event study examining changes in the daily county-level COVID-19 growth rates between March 31 and May 22, 2020. Mandating face mask use in public is associated with a decline in the daily COVID-19 growth rate by 0.9, 1.1, 1.4, 1.7, and 2.0 percentage points in 1-5, 6-10, 11-15, 16-20, and 21 or more days after state face mask orders were signed, respectively. Estimates suggest that as a result of the implementation of these mandates, more than 200,000 COVID-19 cases were averted by May 22, 2020. The findings suggest that requiring face mask use in public could help in mitigating the spread of COVID-19.
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Cites
Lauer, S. A., Grantz, K. H., Bi, Q., Jones, F. K., Zheng, Q., Meredith, H. R., Azman, A. S., Reich, N. G., & Lessler, J. (2020) · Annals of Internal Medicine · doi:10.7326/m20-0504 · Cited by 5,970
Mizumoto, K., Kagaya, K., Zarebski, A., & Chowell, G. (2020) · Eurosurveillance · doi:10.2807/1560-7917.es.2020.25.10.2000180 · Cited by 2,276
Rational use of face masks in the COVID-19 pandemic
Feng, S., Shen, C., Xia, N., Song, W., Fan, M., & Cowling, B. J. (2020) · The Lancet Respiratory Medicine · doi:10.1016/s2213-2600(20)30134-x · Cited by 1,418
Courtemanche, C., Garuccio, J., Le, A., Pinkston, J., & Yelowitz, A. (2020) · Health Affairs · doi:10.1377/hlthaff.2020.00608 · Cited by 773
Face masks for the public during the covid-19 crisis
Greenhalgh, T., Schmid, M. B., Czypionka, T., Bassler, D., & Gruer, L. (2020) · BMJ · doi:10.1136/bmj.m1435 · Cited by 623
Face masks for the public during the covid-19 crisis
Greenhalgh, T., Schmid, M., Czypionka, T., Bassler, D., & Gruer, L. D. (2020) · Zurich Open Repository and Archive (University of Zurich) · doi:10.5167/uzh-187180 · Cited by 608
Furukawa, N. W., Brooks, J. T., & Sobel, J. (2020) · Emerging Infectious Diseases · doi:10.3201/eid2607.201595 · Cited by 507
Face mask use and control of respiratory virus transmission in households
MacIntyre, C. R., Cauchemez, S., Dwyer, D. E., Seale, H., Cheung, P., Browne, G., Fasher, M., Wood, J., Gao, Z., Booy, R., et al. (2009) · Emerging Infectious Diseases · doi:10.3201/eid1502.081166 · Cited by 461
Long, Y., Hu, T., Liu, L., Chen, R., Guo, Q., Yang, L., Cheng, Y., Huang, J., & Du, L. (2020) · Journal of Evidence-Based Medicine · doi:10.1111/jebm.12381 · Cited by 339
Xiao, J., Shiu, E. Y. C., Gao, H., Wong, J. Y., Fong, M. W., Ryu, S., & Cowling, B. J. (2020) · Emerging Infectious Diseases · doi:10.3201/eid2605.190994 · Cited by 243
Cited by
Transmission of SARS-CoV-2: A Review of Viral, Host, and Environmental Factors
Meyerowitz, E. A., Richterman, A., Gandhi, R. T., & Sax, P. E. (2021) · Annals of Internal Medicine · doi:10.7326/m20-5008 · Cited by 747
Modeling COVID-19 scenarios for the United States
IHME COVID-19 Forecasting Team, Reiner, R. C., Barber, R. M., Collins, J. K., Zheng, P., Adolph, C., Albright, J., Antony, C. M., Aravkin, A. Y., Bachmeier, S. D., et al. (2021) · Nature Medicine · doi:10.1038/s41591-020-1132-9 · Cited by 556
Who is wearing a mask? Gender-, age-, and location-related differences during the COVID-19 pandemic
Haischer, M. H., Beilfuss, R., Hart, M. R., Opielinski, L., Wrucke, D., Zirgaitis, G., Uhrich, T. D., & Hunter, S. K. (2020) · PLOS ONE · doi:10.1371/journal.pone.0240785 · Cited by 513
Bundgaard, H., Bundgaard, J. S., Raaschou-Pedersen, D. E. T., von Buchwald, C., Todsen, T., Norsk, J. B., Pries-Heje, M. M., Vissing, C. R., Nielsen, P. B., Winsløw, U. C., et al. (2021) · Annals of Internal Medicine · doi:10.7326/m20-6817 · Cited by 388
Impact of community masking on COVID-19: a cluster-randomized trial in Bangladesh
Abaluck, J., Kwong, L. H., Styczynski, A., Haque, A., Kabir, M. A., Bates-Jefferys, E., Crawford, E., Benjamin-Chung, J., Raihan, S., Rahman, S., et al. (2022) · Science · doi:10.1126/science.abi9069 · Cited by 333
Metadata
- Authors
- Lyu, W., & Wehby, G. L.
- Venue
- Health Affairs
- Publisher
- Health Affairs Publishing, LLC
- Published
- 2020-08-01
- Volume
- 39
- Issue
- 8
- Pages
- 1419-1425
- ISSN
- 0278-2715 (ISSN-L)
- 1544-5208
- OpenAlex
- W3035550116
- Cited by
- 721
- References
- 10
- FWCI
- 25.67
- Type
- journal article
- Language
- en
- Open access
- closed
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- Lyu, W., & Wehby, G. L. (2020). Community Use Of Face Masks And COVID-19: Evidence From A Natural Experiment Of State Mandates In The US: Study examines impact on COVID-19 growth rates associated with state government mandates requiring face mask use in public. Health Affairs. https://doi.org/10.1377/hlthaff.2020.00818
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