Definition close contact : 近距离接触的定义:
• Health care associated exposure, including providing direct care for COVID-19 patients, working with health care workers infected with COVID-19, visiting patients or staying in the same close environment of a COVID-19 patient.
• Working together in close proximity or sharing the same classroom environment with a with COVID-19 patient.
• Traveling together with COVID-19 patient in any kind of conveyance. 与COVID-19患者一起旅行。
• Living in the same household as a COVID-19 patient. 与COVID-19患者住在同一家庭。