Figure 4. Peripheral blood cytokines after endotoxin challenge.

Volunteers who had received i.d. endotoxin (total 40 ng/volunteer) had serum cytokine levels measured by Meso Scale Discovery immunoassay at baseline and 6 h after endotoxin challenge. Data shown are from four of the five volunteers in the standardized component of the challenge protocol, displayed as mean ± sem; samples from one volunteer were not available for analysis.