
HMPV is a common virus that has been around at least since 2001. Children under five, particularly infants, and adults over 65 — especially those with health problems — can sometimes become seriously ill from HMPV. However, for most other people, the symptoms are generally mild.
On Sunday, China said cases of HMPV had declined among residents in its northern provinces, where the respiratory infections were rising. Chinese health officials say the number of patients seeking medical help remains lower compared to the same period last year. Still, some health experts are calling for more transparency in order to reduce the spread of rumors and misunderstandings.
Ho said China's COVID-19 prevention measures during the pandemic curbed the spread of diseases, which led to a decline in herd immunity, potentially causing the current surge in cases over a short time period.
Auwaerter agrees.
"They stayed home, refrained from work, wore masks,” he says. “So, the usual cycles of acquiring an infection, for example, during the respiratory season of winter, people didn't get infected. So, their specific immunity, they weren't boosted, and so there was a larger population that might be more susceptible.”
There is no real treatment or vaccine for HMPV. Doctors say any patients who have trouble breathing should seek medical help.
Chan-Long Ku of VOA's Mandarin Service contributed to this report.
(VOA/PD)