Measles, the need for a paradigm shift.

Measles vaccination schedules and targets of herd immunity have been designed according to the paradigm that the vaccine is as protective as natural infection, and the virus has remained of a single serotype over many decades. As a result, ongoing measles resurgence is mostly attributed to gaps in immunization. Using official data, we investigated the correlation between the rate of vaccine coverage reported and aggregated at the national level, and the incidence of cases. We discussed the limits of this indicator considered in isolation. We provide a literature overview of measles vaccine efficacy and failures. We questioned whether measles strains could escape the vaccine. Immunization tools and strategies for measles control deserve to be optimized in the current context.