Details are as follows:
1, low risk, no confirmed cases or new confirmed cases for 14 days;
2. Medium risk. There are newly confirmed cases within 14 days, and the cumulative number of confirmed cases is no more than 50, or the cumulative number of confirmed cases is more than 50, and there is no cluster epidemic within 14 days;
3, high risk, cumulative cases of more than 50 cases, and cluster epidemic occurred within 14 days.
Novel coronavirus's contact route is as follows:
1, people who live, study, work or have close contact with the case, such as working near the case, or sharing a classroom and a room with the case;
2, diagnosis and treatment, nursing, medical staff to visit the case, and family members or other people who have similar close contact with the case, such as direct treatment and care of the case, visit the patient or stay in the closed environment where the case is located, other patients with the same medical history and other accompanying personnel;
3. People who were in the same car with the case and had close contact, including people who had taken care of the patient in the car and colleagues of the patient, found through investigation and evaluation that other passengers and crew members may have close contact with the patient.
legal ground
Law of People's Republic of China (PRC) on the Prevention and Control of Infectious Diseases
Seventh disease prevention and control institutions at all levels shall undertake the monitoring, prediction, epidemiological investigation and epidemic report of infectious diseases.
Medical institutions undertake the prevention and treatment of infectious diseases related to medical treatment and the prevention of infectious diseases in their areas of responsibility. Urban communities and rural grass-roots medical institutions shall, under the guidance of disease prevention and control institutions, undertake the corresponding prevention and control of infectious diseases in urban communities and rural grass-roots units. Twenty-first medical institutions must strictly implement the management system and operational norms stipulated by the health administrative department of the State Council to prevent iatrogenic infection and hospital infection of infectious diseases.
Medical institutions shall designate special departments or personnel to undertake the epidemic report of infectious diseases in their own units, the prevention and control of infectious diseases and the prevention of infectious diseases in their responsible areas; Undertake monitoring, safety protection, disinfection, isolation and medical waste disposal of risk factors related to hospital infection in medical activities.
Disease prevention and control institutions shall designate special personnel to guide and evaluate the prevention of infectious diseases in medical institutions, and carry out epidemiological investigations.