With the spread of coronavirus-19 worldwide and the discovery of case 32 confirmed COVID-19 patient to be an undocumented migrant worker, it has been a topic of wide discussion on whether overstaying population causes vulnerability to Taiwan’s disease control. “To cope with this issue, the National Immigration Agency(NIA) initiated the Expanded Overstayers Voluntary Departure Program, which starts from April 1st and ends on June 30th with a promotion period from March 20th to March 31st, 2020.