A novel strain of influenza A(H7N9) virus has emerged in China and is causing mild to severe clinical symptoms in infected humans. Some case-patients have died. To further knowledge of this virus, we report the characteristics and clinical histories of 4 early case-patients.
Keywords: China; H7N9; Shanghai; case reports; diagnosis; influenza; influenza A(H7N9) virus; subtype H7N9; treatment; viruses.