The CDC said they know that human metapneumovirus cases in northern China are increasing after Chinese media confirmed positive cases are rising significantly among children 14 or younger.

“CDC is aware of reported increases of HMPV ... despite respiratory illnesses being down overall since last year. Human metapneumovirus, or HMPV, is not a novel respiratory virus, having first ...

"Now we have diagnostic panels that can tell you whether you have influenza or COVID or RSV or human metapneumovirus." HMPV has an incubation period of three to six days, according to the CDC.