gene transfer using plasmid vector pVAX2 sham gene transfer using an empty plasmid vector pVAX2 2021-03-08T13:54:50Z PMID:19440225 PMID:21993171 This is any condition in which the main influencing factor is gene transfer of an empty plasmid vector pVAX2. The pVAX2 plasmid is based on the pVAX1 plasmid, which was designed for use in the development of DNA vaccines. XCO:0000820 experimental_condition_ontology gene transfer using empty plasmid vector pVAX2 gene transfer using only the backbone of plasmid vector pVAX2 slaulede sham gene transfer using an empty plasmid vector