| •owl:Thing |
| •SpatioTemporalThing |
| •Perdurant |
| •Event |
| •Phenomenon |
| •BiologicalPhenomenon |
| •HealthDisorderPhenomenon |
| •DiseasePhenomenon |
| •InfectiousIllness |
| •ViralInfectionRelatedIllness |
| •Smallpox |
| •HazardousPhenomenon |
| •HealthDisorderPhenomenon |
| •DiseasePhenomenon |
| •InfectiousIllness |
| •ViralInfectionRelatedIllness |
| •Smallpox |