Hey there

if you're looking for current events, just have a browse through the health sections of news websites! The conversation also has some pretty good stuff. Just gotta browse around!
Tbh, I doubt you're gonna get asked about med related stuff for the interview - they don't expect you to have prior knowledge going into the course! It's just scenarios where you have to apply reasoning and all that (so like, maybe the scenario will be a medical one, but it's not one where you actually need knowledge to be able to answer it) - it's not too bad, just trust your gut instinct and answer the questions carefully
I would provide more specific info but I did the interview for Monash physio (exact same format only with less stations) and had to sign a secrecy form sort of thing haha. Hope this has helped a bit. Good luck for the interviews!