A flu outbreak has recently emerged in China. Lin Xiaoxu, a virology expert and former lab director at Walter Reed Army Institute of Research, explained the diverse types of influenza viruses on the NDTTV's "Health 1+1" program. He warned the public not to overlook the threats from the aggressive avian flu, a variant of influenza type A.Respiratory diseases are on the rise this winter in China. Commonly known viruses include influenza, respiratory fusion, human metapneumovirus, rhino, COVID-19, and a variety of other pathogens. The Chinese authorities claim that influenza A accounted for up to 99 percent of all cases this year, with H1N1 being the dominant strain.