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“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.

“I can imagine a scenario where this becomes a fifth endemic human coronavirus,” said Stephen Morse of Columbia University’s Mailman School of Public Health.