Chief Health Officer (CHO) Jeannette Young made the statement after the delta variant spread to four schools in the Australian state.
"If you're a grandparent of one of these kids, one of these households, and you haven't been vaccinated, please don't go anywhere near your grandkids," Young told reporters.
Unlike other countries, Australia's implementation of the vaccine rollout has been slow, with less than 15 per cent of the population fully vaccinated.
Queensland Deputy Premier Steven Miles also reminded residents under home quarantine that they couldn't leave their abode unless "in an emergency or to get a test."
Young's rhetoric resembles that of Dr. Kerry Chant, the chief health officer of New South Wales, who went so far as to tell Australians that they shouldn't "engage in conversation with each other," even if they're wearing masks, in order to reduce the transmission of COVID.