• People who have fever with at least one respiratory symptom, and have risk history.
• Pneumonia cases who were suspected to have infection by SARS-CoV-2 (COVID-19).
• Clusters of respiratory system infections with epidemiological linkage.
• Educate people on how to notify local public health officers or the Department of Disease Control (DDC) hotline 1422, when meeting travelers have a fever with respiratory symptoms such as cough, sore throat, runny nose or shortness of breath and arriving from the disease infected zones or the risk areas announced by the Provincial Communicable Diseases Committee. Those travelers have to allow the officials or health volunteers for implementing investigation, monitoring and describing how to self-quarantine.