Traverses the transmission chain upwards from a specific individual to
identify all direct and indirect infectors (ancestors).
Usage
find_infectors(outbreak, id, include_self = TRUE)
Arguments
- outbreak
A data frame containing at least id and parent_id.
- id
Integer. The ID of the individual to trace.
- include_self
Logical. If TRUE, the returned vector starts with id.
Value
An integer vector of IDs representing the ancestry chain,
ordered from the individual/parent up to the index case (root).
