A Carterton District Council employee is one of two cases of suspected community transmission of coronavirus.
The man went into self-isolation as soon as he began feeling unwell, said Carterton mayor Greg Lang.
The worker "had a role in council that was operated quite remotely", and he had a small team around him that had gone into self-isolation too.
But Lang said the man's co-workers had today returned negative test results.
He said the worker was in "really good, recovering health".