The crazy theory that masks are building up our coronavirus immunity – 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 …

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