What does it mean to find someone in an emergency?

As soon as a case is discovered, searching for you will be published. Epidemic situation is relatively large, such as severe acute respiratory syndrome (SARS), influenza A (H 1N 1), novel coronavirus, etc. When an epidemic occurs, urgent tracing refers to sending a tracing notice when a case is found, which can buy more time. Novel coronavirus, COVID-19 for short, was named as 20 19 coronavirus disease by the World Health Organization, which refers to pneumonia caused by novel coronavirus infection in 20 19.