Identify
The first step in the “3I system” is identification, i.e.
identification of possibly infected persons (based on possible exposure
or exposure history) and infected persons with any epidemiological risk
factor. These individuals can be identified by on-site inquiry and
examination. Medical personnel must record information on exposure
history and contact history for the early detection of infected patients
and possibly infected patients, and must be aware of this information to
prevent missed or incorrect diagnoses.
One of the characteristics of the “3I system” is to display posters or
even small cards that all medical staff can quickly read and understand.
These displays provide basic information on the diagnosis and
differential diagnosis of new infectious diseases. In this specific
case, these displays can describe the methods used for detection and
diagnosis of COVID-19, and make it easier for medical staff to identify
potential patients. Early identification is the key to reduce the spread
of COVID-19, so it is particularly
important to apply these methods to
prevent and control COVID-19 (Lai et
al., 2020).