The global effort to vaccinate as many people as possible, as quickly as possible is gathering pace, but new variants have thrown a few curve balls.

Australia has secured enough vaccines to immunise everyone several times over, but would a better long-term public health strategy be to vaccinate those in surrounding poorer countries first?

The idea behind this is that large COVID-19 affected populations are more likely to throw off new variants, which might be worse than what we're currently dealing with.

So on today's Coronacast, since Australia has very little virus, why not send what we've got overseas?

Also on today's show:

* Is there a limit to the number of variants that usually arise from a virus like coronavirus?

* We've heard a lot about the so-called South African and UK variants, but what do we know about the Brazil variant?