No significant difference was observed between blood or lung emTh cells expressing CD11a or P-selectin ligand in all infections, and between CCR5, CCR6 and CXCR3 expressing emTh cells derived from B. pertussis and B. parapertussis infected mice at either 5 or 25 days p.i. (data not shown). The gene discussed is CCR5; the disease is infection.