Erratum to "Phase I, randomized, observer-blind, placebo-controlled studies to evaluate the safety, reactogenicity and immunogenicity of an investigational non-typeable Haemophilus influenzae (NTHi) protein vaccine in adults" [Vaccine 34 (2016) 3156–3163]. Issue 42 (9th October 2017) - Leroux-Roels, Geert; Van Damme, Pierre; Haazen, Wouter; Shakib, Sepehr; Caubet, Magalie; Aris, Emmanuel; Devaster, Jeanne-Marie; Peeters, Mathieu