The so-called Indian coronavirus variant B617 is on a mission to take over the world, and it appears that it's slowly achieving that goal.

According to recent data from the UK, it's edging out the local version B117 to become the dominant variant.

So what does this all mean? Well, it means that it's probably more infectious and that might be what is giving it the edge.

But is it more deadly or more resistant to vaccines? That's on today's Coronacast.

Also on today's show:

* My parents have both been fully vaccinated with Pfizer in the UK. Why can't Australia allow fully vaccinated people to visit?

* How true is the 0 to 10 per cent effectiveness of the AstraZeneca vaccine against the South African strain of coronavirus?