Gut check: Should health care workers returning to the US from Africa self-quarantine for 21 days?

In light of the Ebola diagnosis in New York City on Thursday, should health care workers be required to self-quarantine for 21 days upon returning to the U.S. from Africa?

http://www.nbcnews.com/storyline/ebola-virus-outbreak/doctor-tests-positive-ebola-new-york-city-n232801