Inform
“Inform” — timely reporting — is the third step of the “3I system”. Thus, health care workers should promptly report the location where a patient is found and diagnosed to the appropriate hospital department, supervisor, and law enforcement officials. Clear reporting schemes must be developed and alternatives must be available in the “3I system”. Thus, when suspected cases of COVID-19 are identified in China, direct online reporting is required within 2 hours, specimens are collected for PCR analysis, and the suspected individuals are immediately transferred to designated hospitals using safe transportation. These procedures have greatly reduced the number of missed cases.