Since the first human infection of influenza A (H7N9) virus in Shanghai in February 2013
(Gao et al., 2013), the virus has rapidly spread out to 14 provinces of China and caused …

Abstract Background H9N2 influenza A viruses have undergone extensive reassortments in
different host species, and could lead to the epidemics or pandemics with the potential …

On 30 March 2013, a novel avian influenza A H7N9 virus causing severe human respiratory
infections was identified in China. Preliminary sequence analyses have shown that the virus …

Initial genetic characterizations have suggested that the influenza A (H7N9) viruses
responsible for the current outbreak in China are novel reassortants. However, little is known …

Abstract Influenza A (H7N9) virus has been causing human infections in China since
February 2013, raising serious concerns of potential pandemics. Previous studies …

Since 30 March 2013, the Chinese Center for Disease Control and Prevention (China CDC)
has reported the first laboratory-confirmed cases of influenza A H7N9 virus human infection …

Five epidemic waves of human infection with influenza A (H7N9) virus have emerged in
China since spring 2013. We previously described the epidemiological characterization of …

Background Human infection with a novel avian-origin influenza A (H7N9) virus occurred
continuously in China during the first half of 2013, with high infectivity and pathogenicity to …

A 73-year-old man was confirmed to have an influenza A (H7N9) virus infection and the
causative agent A/Beijing/02/2014 (H7N9) virus was isolated. Genetic and phylogenetic …

The emergence of human infection with a novel H7N9 influenza virus in China raises a
pandemic concern. Chicken H9N2 viruses provided all six of the novel reassortant's internal …