"The human metapneumovirus is not a new virus, and has been with humans for at least several decades," said Wang Liping, a researcher at the Chinese Center for Disease Control and Prevention, during a press briefing by China’s National Health Commission.

The rate of infections with the flu-like human metapneumovirus (HMPV) in northern China is declining, a health official said Sunday, amid some international concern over a potential pandemic. HMPV, which belongs to the same family as the respiratory syncytial virus,

Chinese health officials give update on virus infection rate - The update comes amid international concern over a potential pandemic