OVAE representing Afluria VAEs reported in FDA vaccine package insert. (A) The hierarchical structure of Afluria VAEs represented in OVAE. (B) OVAE axiom representation of ‘Afluria-associated injection-site pain AE’ based on three age groups. (C) Afluria adverse reactions recorded in the FDA package insert document. Other VAEs shown in the FDA package inserts are also represented in OVAE. The subfigures (A) and (B) were screenshots of OVAE using the Protégé OWL editor. The text from (C) comes from the FDA package insert document of the Afluria vaccine.