As the BA2 subvariant of Omicron infects its way to the top of the coronavirus leaderboard, we're thanking our lucky stars that it's not as or more severe than Delta.

But imagine a coronavirus variant that has genes from both Omicron and Delta: enter Deltacron

The ability for two variants to combine and share genetic information is possible, and according to recent research has already happened.

So what's the possibility the next variant of concern will not be due to mutation, but instead combining?

Also on today's show:

* Antibody profile after Omicron

* What makes something a subvariant and not just a new variant?

* Lots of questions about fourth doses