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Robert Klitzman is a professor of psychiatry and the director of the online and in-person Masters of Bioethics Program at Columbia University.

“Dramatic reductions” in the spread should begin this month if containment works, said Dr. Ian Lipkin, director of Columbia University’s Center for Infection and Immunity.

"If you have a lot of people who are asymptomatic and not seeking medical care but are still contagious, you're going to have a very difficult time," says Jeffrey Shaman of Columbia University.