APMAP and infection: Receptor dependent entry requires the sialic acid containing attachment receptor LSTc followed by entry receptor(s) 5-HT2R. While recent work points to other potential receptors that may contribute to infection for different virus genotype backgrounds and/or cell types (i.e., types 1, 2, or 3 and gangliosides vs. APMAP), further work is needed to define these additional virus-receptor interactions and determine relevance to disease progression.