Abstract
Human metapneumovirus (HMPV), a single-stranded negative-sense RNA virus belonging to the family Paramyxoviridae, is associated with respiratory tract illness, primarily in young children and persons with underlying disease. Based on genetic and antigenic variation, HMPV strains are classified into two serotypes, with isolates NL/1/00 and NL/1/99 as prototypes for serotypes A and B, respectively. The development of plasmid-based reverse genetics systems for both serotypes has resulted in developments of a wide range of vaccine candidates against HMPV infection. The approach to virus rescue of HMPV is similar to that used for other paramyxoviruses, starting with mini-replicon assays for optimizations of the rescue protocols and subsequent replacement of the mini genome with a plasmid expressing the cDNA of the full-length viral RNA genome. Here, we provide detailed information on the reverse genetics systems for HMPV.
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