Nature Microbiology 1, 16066 (2016); published 26 April 2016; corrected 29 April 2016

The original version of this Editorial incorrectly suggested that the DTP3 vaccine is currently available in only half of the WHO regions. The intention was to note that in 2014 DTP3 vaccine coverage was less than 90% in half of the WHO regions. This has been corrected in all versions of the article.