Dr. Nancy Messonnier, the head of Centers for Disease Control and Prevention's National Center for Immunization and Respiratory Diseases, told reporters on Tuesday that Americans should be prepared for a coronavirus outbreak in the U.S., warning the "disruption to everyday life could be severe." "It's not so much a question of if this will happen any more, but rather more a question of exactly when this will happen and how many people in this country will have severe illness," she said. The coronavirus, which originated in China, has quickly spread to several countries, including Iran, Italy, and Japan, raising the CDC's "level of concern and expectation" that it will also spread in the U.S.

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