It is not possible to directly assess the magnitude of the risk of infection of a neoconjugate. The definition of a neoconjugate is complex and usually includes a variety of situations, such as direct contact with the patient by family members living in the same room as the patient, direct caregivers, or providers of medical care. The longer and more frequent the contact with the patient, the greater the likelihood of diagnosis, but it is also influenced by the virulence and amount of virus in the patient, the immunity of the contact, and whether the contact has taken safe and effective protective measures. Therefore, it is not possible to quantitatively assess the likelihood of infection in a person who has been closely exposed to a new crown. The only way to determine whether a person is infected with the new crown is to conduct regular nucleic acid tests in isolation. The fact that a person is “closely connected” does not mean that he/she will be infected. It is recommended that he/she should take good personal protective measures when going out and avoid going to places where there are many people and the air is not well circulated, so as to minimize the chances of infection.