Bayesian phylogenetic tree based on whole genome sequence of HPIV1–4. Fig. (A–D) correspond to the trees of HPIV1, HPIV2, HPIV3, and HPIV4, respectively. The prototype strains, the strains obtained in this study, and other Chinese strains are indicated by blue triangles, red solid circles, and red pentagrams, respectively. The names of the strains include the GenBank number, serotype, country of isolation, name, and year of the collection. The country abbreviations ARG, AUS, BRA, CHE, CHN, FRA, GBR, HRV, ITA, JPN, MEX, NLD, PER, THA, UGA, USA, and VNM in the trees represent Argentina, Australia, Brazil, Switzerland, China, France, the United Kingdom, Croatia, Italy, Japan, Mexico, the Netherlands, Peru, Thailand, the Republic of Uganda, the United States, and Vietnam, respectively.