That doesn't sound like a legally enforceable quarantine; if they were kept in their rooms by force, that would be unlawful detention.
Of course, if you legit have the swine flu, you probably won't be milling about anyway.
Of course, if you legit have the swine flu, you probably won't be milling about anyway.
Of course it is. The word "quarantine" does not automatically imply the threat of force.