- Peripheral blood mononuclear cells from infants hospitalized because of respiratory syncytial virus infection express T helper-1 and T helper-2 cytokines and CC chemokine messenger RNA. Tripp, R.A., Moore, D., Barskey, A., Jones, L., Moscatiello, C., Keyserling, H., Anderson, L.J. J. Infect. Dis. (2002)