An unexpected COVID crisis

Two years into the pandemic, we're still discovering new things about COVID almost daily.

The latest is what COVID can do to your heart, a year after you've been infected.

A huge study has shown really disturbing problems from heart attacks, to strokes, to blood clots on the lungs to heart failure.

So on today's Coronacast, who is at most risk? And what does this tell us about COVID as a disease?

Also on today's show:

* International tourists - what will they bring?

* The real story about aged care

* Who needs a fourth dose, when and why?