Healthcare workers returning to New York or New Jersey from treating Ebola patients in West Africa will be placed under a mandatory quarantine, officials announced a day after a Médecins Sans Frontières MD was diagnosed with the virus in New York City. N.J. Gov. Chris Christie and N.Y. Gov. Andrew Cuomo made the announcement as part of a broader procedural plan to help protect the densely packed, highly populated area from any further spread of the disease. “Since taking office, I have erred on the side of caution when it comes to the safety and protection of New Yorkers, and the current situation regarding Ebola will be no different,” Gov.