This detention for Public Health has been on the books for a long time, but to go active, it must have an executive order which must specify what disease(s).
Here are the answers to a lot of questions. This is a CDC summary of including a novel type of influenza to the executive order list. It would be almost unchanged by adding ebola to the list.
http://www.cdc.gov/quarantine/qa-executive-order-pandemic-list-quarantinable-diseases.html
So, bizarrely enough, Obama may actually be following the law this time. It had to happen once during his presidency, I suppose.
Barking Moonbats on the Left had their paranoid fantasies about Reagan's "detention centers" yet Obama expands such a notion by royal fiat and there is no outcry from the Left.
REM's Michael Stipe delayed HIV test to stay out of the, um, Reagan-Bush internment camps (Cain TV ^ | Monday June 30th, 2014 | Dan Calabrese)