Lancet Infection Dis: Case isolation, contact tracing, and the effect of maintaining social distance on controlling the new coronary pneumonia outbreak

Isolation and contact tracing of patients withsymptoms ofnew coronary pneumonia are effective ways to curb the spread of the epidemic, and researchers recently assessed the impact of different control measures on reducing transmission in different environmentsthe study, which was a mathematical modeling study, researchers used epidemiological data from 40,162 participants to model individual transmission by environment (family, work, school, or otherwise) to analyze the effects of virus testing, patient isolation, contact tracing, and physical distance, and to estimate changes in the number of contacts who spread the virus and newly isolated under different strategiesresearchers estimate that joint isolation and tracking strategies will reduce transmission compared to large-scale tests or individual self-isolation: mass random testing of 5 per cent of the population per week, with an average reduction in transmission by 2 per cent; Self-isolation reduced transmission by 35 per cent, self-isolation in joint family isolation alone, a 37 per cent reduction in transmission, self-isolation and family isolation alone, and manual contact tracing of all contacts, with a 64 per cent reduction in transmission, and a 57 per cent reduction in close contact tracing and transmissionIf restricted to gatherings outside the home, school, or workplace, tracking only through simple close contacts can reduce transmission with the same effect as complex tracking contactsIn the case of 1,000 new cases of symptoms a day that meet the definition of trigger contact tracing, the researchers estimate that 15,000-41,000 contacts will be quarantined each daystudies have concluded that case isolation, close contact tracing and maintaining appropriate social distances are important ways to control the spread of the new crown outbreak