Recent studies have also suggested that some electrical activity and blood flow continues after brain cell death, just not enough to allow for the whole body to function.

Several studies have shown that SO2 and its derivatives could induce chromosomal aberrations, sister chromatid exchanges and micronuclei in human blood lymphocyte, bone marrow cell in mice and CHL.

Laboratory studies should include a complete blood cell count with differential, an erythrocyte sedimentation rate, and a C-reactive protein (CRP) level;