Answer:
Depends on the situation. Typically, no.
Explanation:
Unlawful detainment is absolutely a no-no. If someone is innocent, they should not be detained against their will, and especially not quarantined.
Situations where it's moral:
Patient with highly contagious illness should be quarentined to avoid spreading it to others.
Mentally ill patient who is a threat to the safety of others should be quarentined to avoid injury of others.
