While cases are climbing in China, the situation is very different from what it was when Covid-19 emerged five years ago, medical experts say. HMPV is common and decades old.

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.

Five years on from the first news of COVID, recent reports of an obscure respiratory virus in China may understandably raise concerns. Chinese authorities first issued warnings about human metapneumo