Tysabri and Travelling

Hey guys, Just wondered if anyones managed to go travelling for long periods of time whilst on Tysabri? I currently have my injections every 6 weeks so have been able to travel around one country for 4 weeks but then have to come back for my next injection. I also wondered if anyone’s been to Australia on it and if the health system works the same over there as it does in the UK? I’ve been wanting to move there for a while and feel like I’m a bit stuck in the UK with the costs. Thanks in advance!