The move came after a New York City doctor who returned to the U.S. a week ago from treating Ebola victims in Guinea was diagnosed with the lethal disease.
Many New Yorkers and others were dismayed to learn that in the week before he was hospitalized, Dr. Craig Spencer rode the subway, took a cab, went bowling, visited a coffee shop and ate at a restaurant.
New Jersey Gov. Chris Christie and New York Gov. Andrew Cuomo said the case forced them to conclude that the two states need guidelines more rigorous than those of the U.S. Centers for Disease Control and Prevention, which recommends voluntary quarantines.
Spencer's illness led lawmakers on Capitol Hill, scientists and ordinary New Yorkers to wonder why he was out on the town after his return from West Africa — and why stronger steps weren't being taken to quarantine medical workers.
"As long as a returned staff member does not experience any symptoms, normal life can proceed," the organization said in a statement.