Nature Reviews Immunology 10, 248–256 (2010)

In the original version of this article, in the section under the subheading “IL-17 and TH17 cells” on page 252, the sentence that began “Furthermore, although IL-17 deficiency leads to increased numbers of IFNγ-producing NK cells in the tumour-draining lymph nodes” was incorrect. This sentence should instead begin “Furthermore, although IL-17 deficiency leads to decreased numbers of IFNγ-producing NK cells in the tumour-draining lymph nodes”. The authors apologize for this error.