A small primary school in Brisbane has remained virtually outbreak-free thanks to a group of dads using science and engineering nous to prevent COVID-19 spreading through classrooms.

School principal Lachlyn Bowie told Millsy at Midday host Steve Mills a working group from Brisbane Independent School, which included an engineer and medical specialist, discussed ways to slow the spread of infection after Queensland's interstate borders reopened and their approach was overwhelmingly successful.

"Everybody was quite concerned with the borders opening up and when they approached me I was really grateful for their expert advice," she told host Steve Mills.

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