Effects of age on H1N1-specific serum IgG1 and IgG3 levels evaluated during the 2011–2012 influenza vaccine season

Table 1 Demographic and serological characteristics of the participants

	Young	Elderly
Participants (n)	35	25
Age (mean years ± SE)	40 ± 3	69 ± 5^b
Gender (M/F)	12/23	11/14
Race (W/B)	20/15	15/10
Ethnic Categories (Hispanic/Non Hispanic)	14/21	8/17
CMV (% positive individuals)	22	78^b
TNF-α (pg/ml)	6 ± 1	13 ± 4^a
IL-6 (pg/ml)	44 ± 18	101 ± 33^b
CRP (pg/ml)	640 ± 95	895 ± 57^b

ISSN: 1742-4933