Reassurance for parents who are sending their children back to school tomorrow

A new study has looked at the spread of Covid-19 at New South Wales schools - nine teachers and nine students who had it.

It's found only two children caught the disease from those people at school.

There was no evidence of children infecting teachers.

Lead researcher Kristine Macartney says there are very low rates of infection of Covid-19 among children and if they do get it, they have mild symptoms.

She says viruses, like influenza, spread very quickly throughout schools but Covid 19 doesn't.