WHO has defined four transmission scenarios for COVID-19:
1. Countries with no cases (No cases);
2. Countries with 1 or more cases, imported or locally detected (Sporadic cases);
3. Countries experiencing cases clusters in time, geographic location and/or common exposure (Clusters of cases);
4. Countries experiencing larger outbreaks of local transmission (Community transmission).
This document describes the preparedness, readiness and response actions for COVID-19 for each transmission scenario. WHO