As China experiences a rise in respiratory infections this winter, one little-known virus has gotten a lot of attention – and some people may worry whether the rise in cases could be felt more broadly around the world.

China’s winter illness season is less severe compared to the year before, according to data from its health authority. But the proliferation of a long-standing though little-known pathogen called human metapneumovirus (hMPV) has been raising alarm both at home and in other countries.

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,