OBI modeling of vaccine protection investigation (a fragment). Major processes are vaccination and pathogen challenge, both of which are subtypes of administering substance in vivo. The roles target of material addition and material to be added role are defined with respect to this parent class. Some objects are syringe, mouse, host role, target of material addition role, VacX and a portion of Influenza Virus. Note that while the figure shows a single input for the survival assessment, in fact there would be many replicates of the experiment shown, with observations of mouse survival from all of them input to the survival assessment.