Infrastructure: In many countries the quality of the infrastructure varies and therefore the time needed to get the medical oxygen equipment in place. One can imagine that if the depot is on the mainland and the client will stay on a island it can take a while before replacement oxygen can be available. It is vitally important to check with OxygenWorldwide what the possibilities are before departure and stays on a island with e.g. a portable oxygen concentrator (POC) which could break down.