Contact tracing to rapidly isolate people who could be infected with coronavirus disease 2019 (COVID-19) reduced the length of time people were infectious in the community over 4 weeks (from 14 January to 12 February 2020) in Shenzhen, China, according to results from 391 cases and 1,286 of their close contacts, published in The Lancet Infectious Diseases journal.
from Medical Xpress - latest medical and health news stories https://ift.tt/3eXHaoZ