A Narrative Review of Current Updates, Advancements, and Evolving Landscape in Public Health Research of Human Metapneumovirus

Human metapneumovirus (hMPV) is among the common sources of acute respiratory infection (ARI) that appears especially during the winter and spring season. The virus remains in circulation around the world and has been reported to contribute 5-25% of ARIs, particularly among the elderly, young children, and immunocompromised people. However, still a few gaps exist in its diagnostics, therapeutics, and many other research areas concerning hMPV, which need to be addressed to completely understand its exact impact and situation. In order to present much of the relevant information related to hMPV, a detailed literature review was conducted. A targeted search strategy was executed across relevant bibliographic databases, ensuring a broad and inclusive retrieval of pertinent studies. Phylogenetic analyses indicate a complex and dynamic hMPV epidemiology, with localized outbreaks. Studies demonstrate that hMPV infection is most prevalent in early childhood. Its symptoms may include from mild flu or cold-like symptoms to serious complications like bronchitis or pneumonia. Molecular diagnostics techniques including polymerase chain reaction (PCR), reverse-transcriptase PCR, multiplex assays, and array-based technologies are used for hMPV detection. Ongoing research aims to develop antiviral therapies as supportive care constitutes the current clinical standard for hMPV infection as specific antiviral treatments are unavailable. By clearly delineating critical research priorities, this article intends to inform and guide decision-makers in tackling the complex scientific and technological challenges associated with hMPV. Enhanced global surveillance is necessary to monitor hMPV epidemiology, especially in resource-constrained areas.