The Grampians Public Health Hnit has shed light as to why not all exposure sites appear on public health websites.
It comes after Alfredton Primary listed itself as an exposure site this week, but did not appear online.
Infectious disease physician Aaron Bloch says sites now only appear online, if health experts feel close contacts can’t be reached through the exposure site’s own channels.
"If we have a concern that we haven't reached everyone via the channels of the exposure site, we will list it to get broader exposure," he said.
"But in any situation when we are confident that we've reached everyone through our partners, then we won't need to publish it."