Property talk:P1677

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index case of
primary case, patient zero: initial patient in the population of an epidemiological investigation

Description	primary case, patient zero: initial patient in the population of an epidemiological investigation
Represents	index case (Q1639798)
Data type	Item
Domain	disease outbreak (Q3241045) (note: this should be moved to the property statements)
Allowed values	human (Q5) (note: this should be moved to the property statements)
Example	Thomas Eric Duncan (Q18249266) → Ebola virus disease in the United States (Q17486597)
Source	Health institutes, e.g. World Health Organization, US Centers for Disease Control and Prevention (note: this information should be moved to a property statement; use property source website for the property (P1896))
Lists	Items with the most statements of this property Count of items by number of statements (chart) Items with the most statements Items with the fewest statements Count of items by number of sitelinks (chart) Items with the most sitelinks Items with the most sitelinks, but no link to one Wikipedia (sample: Welsh Wikipedia, cywiki) Items with the fewest sitelinks Most linked wikis Items with the most identifier properties By value of property Most statements Fewest statements Most sitelinks Most linked wikis Total of sitelinks on items Most identifiers Fewest identifiers Items with no other statements Most recently created items Items with novalue claims Items with unknown value claims Usage history (total) Usage history (main statement) Map of people by place values: place of birth educated at work location residence place of death place of burial January 1st dates People with date of birth on January 1 People with date of death on January 1 People with both dates on January 1 Database reports/Humans with missing claims/P1677 Database reports/Constraint violations/P1677 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 30 Main statement 29 96.7% of uses Qualifier 1 3.3% of uses
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[create Create a translatable help page (preferably in English) for this property to be included here]

Value type “disease outbreak (Q3241045)”: This property should use items as value that contain property “instance of (P31)”. On these, the value for instance of (P31) should be an item that uses subclass of (P279) with value disease outbreak (Q3241045) (or a subclass thereof). (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1677#Value type Q3241045, SPARQL

Single value: this property generally contains a single value. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1677#Single value, SPARQL

Inverse property of “has index case (P1660)”:
if [item A] has this property (index case of (P1677)) linked to [item B],
then [item B] should also have property “has index case (P1660)” linked to [item A]. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1677#inverse, SPARQL

Item “instance of (P31): human (Q5)”: Items with this property should also have “instance of (P31): human (Q5)”. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1677#Item P31, search, SPARQL

Item “sex or gender (P21)”: Items with this property should also have “sex or gender (P21)”. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1677#Item P21, search, SPARQL

Item “date of birth (P569)”: Items with this property should also have “date of birth (P569)”. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1677#Item P569, SPARQL

Item “place of birth (P19)”: Items with this property should also have “place of birth (P19)”. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1677#Item P19, search, SPARQL

Scope is as main value (Q54828448): the property must be used by specified way only (Help)

List of violations of this constraint: Database reports/Constraint violations/P1677#Scope, hourly updated report, SPARQL

Citation needed: the property must have at least one reference (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1677#citation needed