Infectious disease
According to Enforcement and regulation for School Health and Safety Act, when you are infected to a particular infection such as influenza you need to stay at home for a certain period of time. As for how to deal with the missed classes and absences during missed attendance, confirm with the front desk of Academic affairs of each department by phone or email.
The suspension period for those infected with COVID-19 is shortened from 7 days to 5 days. (Suspension of attendance of close contacts with an infected person, no longer required.)
― The Enforcement Regulations of the School Health and Safety Law stipulates that attendance is suspended "until 5 days have passed since the onset of symptoms and 1 day has passed since symptoms have subsided." ―
For details on handling absences from classes or exams during this time, please contact the person of academic affairs at your undergraduate/graduate school by email or phone.