The technology involves genetically engineering Human Metapneumovirus (HMPV) to express enhanced green fluorescent protein (GFP), enabling the monitoring of virus infection and gene expression through GFP fluorescence. This system serves as a sensitive and versatile tool for virology research, antiviral drug screening, and diagnostic applications. Researchers can use it to study HMPV behavior in real-time, identify potential antiviral compounds, and quantify viral particles in samples, making it invaluable for advancing our understanding of HMPV infections and the development of antiviral interventions.