A rise in cases of human metapneumovirus in China is stoking fears of a new health crisis, though authorities and experts say prospects for a sequel to the COVID-19 pandemic are remote. The big picture: HMPV is similar to respiratory syncytial virus,

As China continues to monitor an increase in cases of human metapneumovirus (HMPV), here's what you need to know about the illness.

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.