A previously healthy adolescent with evolving infiltrates and progressive respiratory distress.

1999;155:841–51. 24. Beyer M, Bartz H, Horner K, et al. Sustained increases in numbers of pulmonary dendritic cells after respiratory syncytial virus infection. J Allergy Clin Immunol 2004;113:127–33. 25. Brimnes MK, Bonifaz L, Steinman RM, et al. Influenza virus-induced dendritic cell maturation is associated with the induction of strong T cell immunity to a coadministered, normally nonimmunogenic protein. J Exp Med 2003;198:133–44. 26. Umetsu DT, DeKruyff RH. The regulation of allergy and asthma. Immunol Rev 2006;212:238–55. 27. Zheng Y, Rudensky AY. Foxp3 in control of the regulatory T cell lineage. Nat Immunol 2007;8:457–62. 28. Guerrero-Plata A, Casola A, Suarez G, et al. Differential response of dendritic cells to human metapneumovirus and respiratory syncytial virus. Am J Respir Cell Mol Biol 2006;34:320–9. 29. Kurt-Jones EA, Popova L, Kwinn L, et al. Pattern recognition receptors TLR4 and CD14 mediate response to respiratory syncytial virus. Nat Immunol 2000;1:398–401. 30. Grayson MH, Ramos MS, Rohlfing MM, et al. Controls for lung dendritic cell maturation and migration during respiratory viral infection. J Immunol 2007;179:1438–48.