Unable to find a link to a genuine news source on this.
There are a couple but they all reference the same TV news report that aired one night.
Bennett says new measures mulled as COVID infections, serious cases keep rising
Officials to weigh reimposing some virus restrictions as Delta variant spreads
I'd like to know the vaccination status of the kids who contracted the virus from the original spreader. If they were unvaccinated, which I suspect, it would reinforce the value of the vaccines and trash the anti-vax narrative.