NEW YORK (AP) — The governors of New York and New Jersey are at odds with scientists over Ebola as they back 21-day quarantines for medical workers returning from West Africa.

The two governors late Sunday night emphasized separately that their policies permit home confinement for medical workers who've had contact with Ebola patients if the workers show no symptoms. They'll receive twice-daily monitoring from health officials.

The director of the National Institute of Allergy and Infectious Diseases, the nation's top infectious-disease expert, warns that such restrictions are unnecessary and could discourage medical volunteers.

Dr. Anthony Fauci says the best way to protect Americans is to stop the epidemic in Africa and that health care workers are needed there.

Cuomo says he's willing to be criticized for being cautious.