Natural killer cell activity during measles

Abstract
Natural killer cells are postulated to play an important role in host anti‐viral defences. We measured natural killer cell activity in 30 individuals with acute measles (73 ± 21 lytic units (LU)/107 cells) and 16 individuals with other infectious diseases (149 ± 95 LU) and found it reduced compared with values for adults (375 ± 70 LU; PPin vitro exposure of cells to interleukin‐2. Depressed natural killer cell activity parallels in time the suppression of other parameters of cell‐mediated immunity that occurs during measles.

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