Can you explain? The second paragraph of the majority decision quotes the Louisiana law which it upholds:
"In case that any parish, town, or city, or any portion thereof, shall become infected with any contagious or infectious disease, to such an extent as to threaten the spread of such disease to the other portions of the state, the state board of health shall issue its proclamation declaring the facts and ordering it in quarantine, and shall order the local boards of health in other parishes, towns, and cities to quarantine against said locality"
That sure sounds like it's talking about local quarantines to me.
"In case that any parish, town, or city, or any portion thereof, shall become infected with any contagious or infectious disease, to such an extent as to threaten the spread of such disease to the other portions of the state, the state board of health shall issue its proclamation declaring the facts and ordering it in quarantine, and shall order the local boards of health in other parishes, towns, and cities to quarantine against said locality"
That sure sounds like it's talking about local quarantines to me.