Beijing has reported a significant increase in human metapneumovirus (HMPV) cases, particularly among children, attributed to a seasonal spike. Although HMPV can cause severe illness in vulnerable populations, public health experts emphasize that it is not comparable to Covid-19 as it has existed for decades. The virus spreads through direct contact and contaminated surfaces, with symptoms resembling the flu. Experts suggest that colder temperatures boost virus transmission, leading to the current rise in cases across several countries, including the US and UK.