There have been some great successes in global immunisation in the last decade with the near eradication of polio and reductions in neonatal tetanus. In some developing countries childhood immunisation coverage is increasing, but in others it is still extremely low; for example, only 50% of infants in Sub-Saharan Africa compared to the United Nations goal of 90%. There is still great inequality between wealthy and low income countries in access to and delivery of safe vaccination. Thus there are millions of the most vulnerable children at risk of …