Table 1.

Characteristics of Women Who Received Influenza Vaccination, by Age Group and Human Immunodeficiency Virus (HIV) Status

Characteristic	Young Women		Older Women
	HIV Uninfected (n = 15)	HIV Infected (n = 15)	HIV Uninfected (n = 20)	HIV Infected (n = 20)
Age, y	32.9 ± 4.4	37.9 ± 4.7	65 ± 4.9	61.5 ± 3
Vaccine responder, %	60	47	30	35
Vaccine nonresponder, %	40	53	70	65
CD4+ T-cell count, cells/µL	ND	654.3 ± 313.8	ND	602.7 ± 273.6
Seroprotection
Before vaccination, %	68.6	56.6	50	25
4 wks after vaccination, %	100	93.3	75	55
HAI titer
Before vaccination	64 ± 44.2a,b	36 ± 22.6a	58 ± 59.2a	22.5 ± 10.6
4 wks after vaccination	328 ± 338.8a,b,c	100 ± 53.9a	96.5 ± 83.9a	56 ± 48.08

Data are mean value ± SD or percentage of subjects.

Abbreviations: HAI, hemagglutination inhibition; ND, not determined; SD, standard deviation.

^a Statistically significantly different from older HIV-infected women.

^b Statistically significantly different from young HIV-infected women.

^c Statistically significantly different from older HIV-uninfected women.