A 35-year-old man presented with fever for 3 days and cough for 2 days and was admitted to the emergency department of Jiangxi Provincial People's Hospital. The patient had a history of good physical health with no underlying diseases but had returned to Nanchang, Jiangxi Province, from Wuhan 1 week before. Physical examination showed fever, with a body temperature of 38.7℃, and the laboratory examination results showed a normal leukocyte count (5520/µL), increased neutrophils (76.2%), decreased lymphocytes (16.1%), elevated glucose (7.4 mmol/L), and elevated C-reactive protein (14.00 mg/L). The patient tested negative for eight common respiratory pathogens, which were respiratory syncytial virus, adenovirus, influenza A virus, Mycoplasma pneumoniae, Chlamydia pneumoniae, Legionella pneumophila, parainfluenza virus, and influenza B virus, and the influenza A antigen screening was also negative. Finally, he was diagnosed with 2019-nCoV based on the real-time reverse-transcriptase-polymerase chain reaction (rRT-PCR) amplification of the viral DNA from a sputum sample.