1) CDC. Coronavirus. https://www.cdc.gov/coronavirus/types.html
6) CDC. Coronavirus Disease 2019 (COVID-19) : How COVID-19 spreads. https://www.cdc.gov/coronavirus/2019-ncov/preventgetting-sick/how-covid-spreads.html
8) Unicef. Physical not social distancing. https://www.unicef.org/sudan/press-releases/physical-not-social-distancing
9) 厚労省. 新型コロナウイルスを想定した「新しい生活様式」の実践例を公表しました. https://www.mhlw.go.jp/stf/seisakunitsuite/bunya/0000121431_newlifestyle.html
10) 国立感染症研究所. 積極的疫学調査実施要領における濃厚接触者の定義変更等に関するQ&A. https://www.niid.go.jp/niid/ja/diseases/ka/corona-virus/2019-ncov/2484-idsc/9582-2019-ncov-02-qa.html
12) CDC. Guideline for isolation precautions : Preventing transmission of infectious agents in healthcare settings, 2007. https://www.cdc.gov/infectioncontrol/pdf/guidelines/isolation-guidelines-H.pdf
13) 日本感染症学会提言言 : 今冬のインフルエンザと COVID-19に備えて. http://www.kansensho.or.jp/uploads/files/guidelines/2008_teigen_influenza_covid19.pdf
15) CDC. Interim infection prevention and control recommendations for healthcare personnel during the coronavirus disease 2019 (COVID-19) pandemic. https://www.cdc.gov/coronavirus/2019-ncov/hcp/infection-control-recommendations.html
16) CDC. Recommendation regarding the use of cloth face coverings, especially in areas of significant community-based transmission. https://www.cdc.gov/coronavirus/2019-ncov/prevent-gettingsick/cloth-face-cover.html
18) CDC. Guidelines for environmental infection control in health-care facilities, 2013. https://www.cdc.gov/infectioncontrol/pdf/guidelines/environmental-guidelines.pdf
20) 新型コロナウイルス感染症 診療の手引き 2020 19-COVID 第2.2版. https://www.mhlw.go.jp/content/000650160.pdf