Figure 1From: Meta-analysis of variables affecting mouse protection efficacy of whole organism Brucella vaccines and vaccine candidatesOntological representation of a vaccine protection assay and related variables. The variables inside boxes are ontology terms primarily from the Vaccine Ontology (VO). The italicized relation terms are the terms from the Relation Ontology (RO) and the Ontology for Biomedical Investigations (OBI).Back to article page