On March 21, the Central Epidemic Command Center (CECC) announced that travelers who arrived in Taiwan from the United States and East Asia between March 8 and March 18 and developed symptoms in the said period of time are required to undergo home quarantine, and be tested for coronavirus disease 2019 (COVID-19) for retrospective investigation. The CECC indicated that it has linked related data to the National Health Insurance (NHI) system in order to identify individuals who sought medical attention and had upper respiratory symptoms during the specified time period (3000 records) after returning from these countries. The CECC will send text messages to symptomatic persons to remind them to undergo home quarantine, and to voluntarily contact the local public health bureau or health agencies at 1922, the Communicable Disease Reporting and Consultation Hotline, which will arrange COVID-19 testing. Inbound travelers who sought medical care but haven’t received any text messages from health agencies should voluntarily contact the local public health bureau and follow related measures.