Nat. Immunol.; doi:10.1038/ni.3443; corrected online 5 May 2016

In the version of this article initially published online, the units in the vertical axis for Figure 1l were incorrectly stated as '(fold)', and the figure lacked a key. The correct units are '(ng/ml; change from mock)'; the white bars are IL-5, the gray bars are IL-13, and the black bars are IFN-γ. Also, the lowest portions of the images in Figure 4i,j (including the inset in Figure 4j) were incorrectly cropped. The errors have been corrected for the print, PDF and HTML versions of this article.