When does the second close contact start to count the isolation days? Does the second close contact need to be isolated?

According to the Regulations on Epidemic Prevention and Control, the isolation time of close contacts is calculated from the last contact with patients, and then they are under medical isolation observation 14 days, while the centralized isolation time of sub-close contacts is calculated from the last contact with close contacts. During medical isolation observation, the first two nucleic acid tests of close contacts were negative, and the sub-close contacts were 1 and 4.

Do close contacts of two close contacts need to be isolated? Need to be quarantined.

Close contacts of sub-close contacts are called sub-close contacts, and they are people who have had frequent contact with sub-close contacts, such as family members and colleagues. These people are also key risk personnel. According to the Regulations on Epidemic Prevention and Control, the control measures of "7-day home isolation +7-day home health monitoring" must be taken for sub-close contacts, and the period of home isolation is calculated from the date of their last contact with sub-close contacts.

Do people who have had three close contacts need to be isolated? Usually not.

Close contacts usually take the control measures of "7-day home isolation +7-day home health monitoring", but the contacts of close contacts have not yet reached the principle of judging close contacts and generally do not need isolation. However, such people still need to do personal protection, maintain good health habits and healthy lifestyles, improve their awareness of self-protection and health literacy, scientifically implement various prevention and control measures, and consciously prevent the epidemic.

Close contacts are different from ordinary contacts. Sub-close contacts refer to people who have close contact with close contacts, such as living, working, dining and entertainment in the same closed environment, but have not taken effective protection. The key groups are the families and colleagues of close contacts.

General Contacts A general contact refers to a person who has been in contact with suspected cases, confirmed cases and asymptomatic infected persons on the same means of transportation, such as airplanes and trains, and has been in contact with his life, study, work and diagnosis and treatment, and has been in contact with public places such as shopping malls, bus stations and subways, but does not meet the principle of judging close contacts.