Data from overseas suggests that after age, obesity is the biggest risk factor causing more problems than smoking with coronavirus patients.

So why could that be?

On today's show:

* What's the NSW schools report all about?

* Queensland is reducing some restrictions. Why now?

* People are volunteering to be exposed to coronavirus to help test the vaccine. Is that a good idea?

* What is the role of obesity in serious outcomes from COVID-19?

* Why do I need a flu shot to visit my father in an aged care home?

* Are vegans and vegetarians the least affected by COVID-19?

And don't forget to check out Dr Norman Swan's "The Health Report" podcast for more on the issues around volunteering for the coronavirus vaccine.