INCREASED ANTIINFLUENZA-A VIRUS CYTOTOXIC T-CELL ACTIVITY FOLLOWING VACCINATION OF THE CHRONICALLY ILL ELDERLY WITH LIVE ATTENUATED OR INACTIVATED INFLUENZA-VIRUS VACCINE
Gj. Gorse et al., INCREASED ANTIINFLUENZA-A VIRUS CYTOTOXIC T-CELL ACTIVITY FOLLOWING VACCINATION OF THE CHRONICALLY ILL ELDERLY WITH LIVE ATTENUATED OR INACTIVATED INFLUENZA-VIRUS VACCINE, The Journal of infectious diseases, 172(1), 1995, pp. 1-10
The possible enhancement of anti-influenza A virus memory cytotoxic T
cell (CTL) responses to inactivated influenza virus vaccine by coadmin
istration of intranasal live attenuated influenza A virus vaccine was
investigated. Fifty elderly nursing home residents received inactivate
d trivalent influenza virus vaccine intramuscularly and simultaneously
were randomly assigned to receive either bivalent live attenuated inf
luenza A virus vaccine or saline placebo intranasally in a blinded fas
hion. A larger proportion of volunteers who received live attenuated v
irus vaccine than of those who received placebo experienced a postvacc
ination rise in anti-influenza A virus CTL activity (15 of 23 vs. 8 of
24; P < .05). Anti-influenza A virus cytotoxicity was primarily media
ted by CD8(+) T cells and was influenza A virus-specific and HLA-restr
icted. There was a possible advantage of administering live attenuated
with inactivated virus vaccine because of enhanced memory antiinfluen
za A virus CTL activity.