On January 24, 2020 The Lancet published data out of China, titles Clinical features of patients infected with 2019 novel coronavirus in Wuhan, China. 

By Jan 2, 2020, 41 admitted hospital patients had been identified as having laboratory-confirmed 2019-nCoV infection. The median age of the patients was 49·0 years, no children or adolescents were infected.

Of the 41 patients, 13 (32%) were admitted to the ICU because they required high-flow nasal cannula or higher-level oxygen support measures to correct hypoxaemia. Most of the infected were male, less than half with underlying conditions.

Invasive mechanical ventilation was required in four ([only] 10%) patients. . . . As of Jan 22, 2020, 28 (68%) of 41 patients have been discharged and six (15%) patients have died. [1]