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| No mask was worn in direct contact with the confirmed case | No mask was worn in direct contact with the suspected case | Relatives have been exposed to confirmed cases | Have been exposed to fever and cough cases and didn’t wear a mask | Worn a mask in direct contact with the confirmed case | Worn a mask in direct contact with the suspected case or fever and cough case | Had contact with asymptomatic people in Hubei |
| Travel or residence of Wuhan and surrounding areas within 14 days | High | High | High | High | High | High | Medium |
| Residence of Hubei within 14 days | High | High | High | High | High | Medium | Medium |
| Public transport through Wuhan and surrounding areas | High | High | High | Medium | Medium | Medium | Medium |
| Public transport through Hubei (Non-Wuhan) | High | High | Medium | Medium | Medium | Medium | Low |
| Passing through Wuhan but didn’t stop | High | High | Medium | Medium | Medium | Low | Low |
| To other regions outside Wuhan | High | High | Medium | Medium | Medium | Low | Low |
| To other communities with confirmed case reports | High | High | Medium | Low | Low | Low | Low |
| Never went out | High | High | Medium | Low | Low | Low | Low |
| High-risk measures | 1. Four pharyngea samples viral nucleic acid RT-PCT test on days 1, 4, 7 and 14. 2. Home isolation for 14 days; 2. Test body temperature 2 times a day for 14 days; 3. Please see a doctor in time for discomfort during isolation. | ||||||
| Medium-risk measures | 1. Two pharyngea samples viral nucleic acid RT-PCT test, 24 h apart; 2. Home isolation for 7 days; 3. Test body temperature 2 times a day for 14 days; 4. Wear a mask when touching people. | ||||||
| Low-risk measures | 1. Reworkable; 2. Test body temperature 2 times a day for 14 days; 3. Wear a mask when touching people. | ||||||