The crazy theory that masks are building up our coronavirus immunity - a podcast by ABC News

Wearing a mask is one of the simplest and most effective ways you can reduce your chances of catching or spreading coronavirus when you're around other people.

But a new theory suggests the fabric over your face also might be providing a crude form of immunisation against the disease.

The idea is that masks might be allowing a very small amount of the virus to slip through into the airways – not enough to get sick, but just enough to build up some immunity.

On today's show:

* Masks, COVID-19 and immunity. Could they be linked?

* A new survey on Australians attitudes to mandatory masks

* The latest news from the (currently halted) Oxford vaccine trial

* Quick fire Friday (with music this time!)

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