Global trends in vaccination coverage

Universal vaccination programmes have greatly reduced the burden of infectious diseases in both developing and developed countries.1–3 In the 1960s and 1970s, these reductions led to optimism that a victory in the battle against infectious diseases could be within reach. Unfortunately, even though the benefits of most childhood vaccinations are scientifically unquestioned, vaccination coverage rates are far from 100% in many countries, and show substantial variation. Early detection of trends and an improved understanding of underlying mechanisms are paramount to be able to improve vaccination policies.