Note: however, liability can and should be found in cases where an ADF member is posted to (residing at) a location where neither Ross River nor Barmah Forrest viruses are known, but is subsequently required to attend a temporary work place (i.e. a course, a field exercise, a camp etc.) in an area where the disease is endemic. In that circumstance, the doctrine of coverage during off-duty periods ('interval in an overall period of employment' – see part 16.10 [2]) applies and infection with Ross River Fever should be regarded as incidental to that whole overall temporary period of employment.
Links
[1] https://clik.dva.gov.au/user/login?destination=node/20405%23comment-form
[2] https://clik.dva.gov.au/military-compensation-srca-manuals-and-resources-library/liability-handbook/ch-16-accidental-injuries/1610-interval-overall-period-employment