It was common practice in the 40's and 50's to quarantine entire families for measles and chicken pox. I am not a lawyer, but there certainly were legal grounds for a mandatory quarantine back then.
Arrest is legal. That does not mean that all arrests are legal.
I will repeat, If someone comes down with the symptoms and becomes contagious, (and I don't wish that on anyone) I would much rather it happen while quarantined in their home rather than in the subway or bowling alley.
Sure....who needs those pesky constitutional rights. TooTall would feel much better if people get sick while in a quarantine, so we'll just go with that plan. Matter of fact, we'll expand the quarantine to include flu and colds as well. TooTall, you're quarantine bed is right over this way....
I suppose those pesky constitutional rights don't exist for those that were quarantined for non-fatal childhood diseases such as measles and chicken pox, but are going to be observed for life threatening Ebola. You won't mind if I call you a fool will you?