This interim guidance is for clinicians caring for patients with confirmed 2019 novel coronavirus (2019-nCoV) infection. CDC will update this interim guidance as more information becomes available.

There are a limited number of reports that describe the clinical presentation of patients with confirmed 2019-nCoV infection, and most are limited to hospitalized patients with pneumonia.

The incubation period is estimated at ~5 days (95% confidence interval, 4 to 7 days).

Frequently reported signs and symptoms include fever (83–98%), cough (76%–82%), and myalgia or fatigue (11–44%) at illness onset.

Sore throat has also been reported in some patients early in the clinical course. Less commonly reported symptoms include sputum production, headache, hemoptysis, and diarrhea.

The fever course among patients with 2019-nCoV infection is not fully understood; it may be prolonged and intermittent.

Asymptomatic infection has been described in one child with confirmed 2019-nCoV infection and chest computed tomography (CT) abnormalities.

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