Table 1.

Day of Peak Cell Recruitment and Cytokine Levels in Influenza A–infected Lungs

Cell/Cytokine	Juvenile Age	Juvenile Peak (dpi)	Adult Peak* (dpi)	Citation
CD4+ T cells	2 d	14	10	44
	2 d	21	14	54
	3 wk	7	7	45
CD8+ T cells	2 d	14	10	44
	2 d	21	10	54
	3 wk	10†	7	45
Regulatory T cells	2 d	6‡	6‡	54
IFN-γ	2 d	14	7‡	44
	7 d	4	—	75
IL-10	3 wk	9	7	46

Definition of abbreviation: dpi = days post-infection.

^*Adult mice 8–10 weeks old.

^†Last time point assessed.

^‡First time point assessed.