0 5 0 http://purl.obolibrary.org/obo/APOLLO_SV_00000621 lockdown infectious disease control measure 'lockdown infectious disease control measure' SubClassOf 'place closure control strategy' http://purl.obolibrary.org/obo/APOLLO_SV_00000620 physical distancing infectious disease control measure 'physical distancing infectious disease control measure' SubClassOf 'individual treatment control strategy' http://purl.obolibrary.org/obo/APOLLO_SV_00000619 population density datum 'population density datum' SubClassOf 'scalar measurement datum' http://purl.obolibrary.org/obo/APOLLO_SV_00000618 wastewater surveillance data set 'wastewater surveillance data set' SubClassOf 'disease surveillance data' http://purl.obolibrary.org/obo/APOLLO_SV_00000616 wastewater disease surveillance 'wastewater disease surveillance' SubClassOf 'disease surveillance'