on treatment in private hospitals etc. you can get international cover through Bupa and a few others. Premium depends on nationality, gender and age.

They generally exclude dental, optical and pregnancy.

Charges vary a lot so google "health insurance" and go from there.

Personally, I don't think it's a necessity. I'm quite happy with the cover provided by the Govt. Health Card.

*** Light travels faster than sound. That's why most people appear bright until they open their mouths.