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On December 31, 2019, China informed the World Health Organization of a novel viral pneumonia in the city of Wuhan, in Hubei Province. Singapore is an independent city-state 3400 km (2125 miles) from Wuhan, but as a major air hub had an average of 330 000 visitor arrivals from China each month in 2019.1 On January 2, 2020, Singapore’s Ministry of Health alerted all physicians to identify any patient with pneumonia and a recent travel history to Wuhan. On January 3, Singapore started temperature screening at its airport of all travelers arriving from Wuhan. Researchers in China identified a novel coronavirus as the causative agent on January 9,2 the genetic sequence was released on January 12,3 and human transmission to health care workers was confirmed on January 20.4
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Corresponding Author: John E. L. Wong, MBBS, Yong Loo Lin School of Medicine, Department of Medicine, National University of Singapore, 1E Kent Ridge Rd, Singapore 119228, Singapore (firstname.lastname@example.org).
Published Online: February 20, 2020. doi:10.1001/jama.2020.2467
Correction: This article was corrected on March 4, 2020, to present the first author’s complete affiliations.
Conflict of Interest Disclosures: None reported.
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