Conclusion
The early detection and prevention of COVID-19 should focus on hospital
outpatients, emergency room patients, and individuals entering or
leaving an area with known or suspected infections. The introduction and
implementation of the concept of “vital sign zero” should be used
before taking baseline measurements of breathing, heartbeat, blood
pressure, and other vital signs. Based on the information collected,
medical workers take appropriate personal protective measures that
reduce the probability of becoming infected. At the same time, the “3I
System” should be used to detect patients with COVID-19 as early as
possible, so that isolation and reporting can be performed according to
the predetermined plan to prevent the spread and reduce the prevalence
of this disease. For potentially infectious patients, especially highly
infectious patients, the “3I System” provides a simple and effective
template for management. Because of COVID-19 and other emerging
infectious diseases, the establishment of such a system could provide
significant benefits to public health.