Can we still vaccinate the world?

If you thought Australia's vaccine rollout was on the slow side, then spare a thought for Ethiopia, Nigeria or Kenya, where vaccination rates are still in the low single digit percentage points. Many argue it's proof the system designed to level the vaccine playing field between rich and poor countries is failing dismally. So what went wrong with COVAX? And is it too late to turn it around? Today on The Signal, the yawning gap between countries like Australia and the world's poorest when it comes to vaccination, and what happens if that gap isn't closed. Featured: Andrea Taylor, Assistant Director of Programs, Duke Global Health Innovation Centre, Duke University, US