The human metapneumovirus is reportedly surging in China, but should Americans be concerned? Here's what to know about HMPV symptoms and more.

News that northern China is seeing a surge of the respiratory illness called human metapneumovirus (HMPV), bringing an uptick in hospitalizations, is sparking a bit of anxious déjà vu on social media.

Most HMPV infections are mild, resembling bouts of the common cold. But severe cases can result in bronchitis or pneumonia, particularly among infants, older adults and immunocompromised people. Patients with pre-existing lung conditions, such as asthma, chronic obstructive pulmonary disease or emphysema, are at higher risk of severe outcomes.

The Centers for Disease Control and Prevention says there is a reported spike in human metapneumovirus (HMPV) in China, and they are monitoring it closely.

As cases of the HMPV virus continue to increase in the U.S. and in China, here's what you need to know about the virus.

India confirmed its first cases of human metapneumovirus (HMPV) infections in children, with a total of seven cases reported as of Tuesday. The cases were reported in Bengaluru, Nagpur, Tamil Nadu and Ahmedabad,

Disease experts have called on Chinese authorities to reveal critical data about a worrying outbreak of HMPV, which can be deadly for those with underlying health conditions