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Mask Effectiveness for Preventing Secondary Cases of COVID-19, Johnson County, Iowa, USA
In September of 2020, the Iowa Department of Public Health released guidance stating that persons exposed to someone with coronavirus disease (COVID-19) need not quarantine if the case-patient and the contact wore face masks at the time of exposure. This guidance differed from that issued by the Cen...
| Autores principales: | , , , , |
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| Formato: | Online Artículo Texto |
| Lenguaje: | English |
| Publicado: |
Centers for Disease Control and Prevention
2022
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| Materias: | |
| Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8714203/ https://www.ncbi.nlm.nih.gov/pubmed/34637377 http://dx.doi.org/10.3201/eid2801.211591 |