In China, H9N2 avian influenza virus (AIV) has become widely prevalent in poultry, causing
huge economic losses after secondary infection with other pathogens. Importantly, H9N2 …

In early 2013, human infections caused by a novel H7N9 avian influenza virus (AIV) were
first reported in China; these infections caused severe disease and death. The virus was …

The H7N9 avian influenza virus (AIV) that emerged in China have caused five waves of
human infection. Further human cases have been successfully prevented since September …

H7N9 subtype avian influenza viruses (AIV) circulating in China over recent years have had
an enormous impact on public health and economy. During the period between November …

The H9N2 subtype of avian influenza virus (H9N2 AIV) has caused significant losses in
chicken flocks throughout China. At present, consensus has been reached that field isolates …

Human infections with the H7N9 influenza virus have been eliminated in China through
vaccination of poultry; however, the H7N9 virus has not yet been eradicated from poultry …

The H5N8 avian influenza viruses have been widely circulating in wild birds and are
responsible for the loss of over 33 million domestic poultry in Europe, Russia, Middle East …

Despite the long-term vaccination programs implemented in China, H9N2 avian influenza
viruses (AIVs) continue to persist in chicken populations, even in vaccinated flocks. We …

ABSTRACT H9N2 avian influenza viruses (AIVs) pose an increasing threat to the poultry
industry worldwide and have pandemic potential. Vaccination has been principal prevention …

In early 2021, roughly 6 months after the H7N9 H7‐Re3 and H7N9 rLN79 vaccine strains
were introduced into China, we monitored a number of H7N9 subtype avian influenza …