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Pediatric Terrorism and Disaster Preparedness

Public Health Emergency Preparedness

This resource was part of AHRQ's Public Health Emergency Preparedness program, which was discontinued on June 30, 2011, in a realignment of Federal efforts.

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Figure 6.5. Pattern of a Series of Blood Counts Graphed Over Time After 3 Gy of Whole-Body Exposure

Line graph shows the pattern of blood counts over time after 3 Gy of exposure. Lymphocyte levels fall immediately on day 1. At about 30 days, cell counts are at their lowest.

Note: Typical changes in the peripheral blood profile will occur as early as 24 hours after irradiation, with lymphocytes falling immediately on day 1. At about 4 weeks, cell lines bottom out. Without white cells, overwhelming infection occurs, and without platelets, hemorrhage is expected.

Source: Armed Forces Radiobiology Research Institute.

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