Cases of human metapneumovirus — or HMPV — are spiking in northern China. HMPV is an acute respiratory infection that can cause serious complications for the elderly and immunocompromised. Simon Clarke, a professor in cellular microbiology at the University of Reading in England, tells The World’s Carolyn Beeler that HMPV has been around for decades, resulting in broad population-level immunity to the virus.
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