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The world is in the midst of the coronavirus disease 2019 (Covid-19) pandemic,1,2 and New York City has emerged as an epicenter. Here, we characterize the first 393 consecutive patients with Covid-19 who were admitted to two hospitals in New York City.

This retrospective case series includes adults 18 years of age or older with confirmed Covid-19 who were consecutively admitted between March 3 (date of the first positive case) and March 27, 2020, at an 862-bed quaternary referral center and an affiliated 180-bed nonteaching community hospital in Manhattan. Both hospitals adopted an early-intubation strategy with limited use of high-flow nasal cannulae during this period. Cases were confirmed through reverse-transcriptase–polymerase-chain-reaction assays performed on nasopharyngeal swab specimens. Data were manually abstracted from electronic health records with the use of a quality-controlled protocol and structured abstraction tool (details are provided in the Methods section in the Supplementary Appendix, available with the full text of this letter at NEJM.org).