D. O. SHIELS 







Figure 



30 



20 AO 60 80 100 



Days since commencement of exposure 



2. Index 1 of Mr. X (No. 1 of the i"Cs cases) and No. 1 

 of the ^''Co cases (small boy of four years) 



Mean curve for Co' 



20 AO 60 80 100 120 



Days since commencement of exposure 



Figure 3. Mean curve of Index 1 for all ^"Co cases and No. 1 of the 



i^'Cs cases 



Comparison of accidentally exposed persons with unexposed persons 



The values of the various newer tests for accidentally exposed persons 

 have been compared with those for unexposed persons. The group of exposed 

 persons was made up of Mr. X and his wife, the two fellow workmen who 

 worked with him most closely, his three children, the boy who handled the 

 cobalt ampoule, his little companion and his mother. The unexposed group 

 consisted of clerical and other staff of the Victorian Health Depart- 

 ment and 20 small healthy children. The results for exposed children (five) 

 are shown in Table 3 and illustrated in Figure 4. There was a very significant 

 difference between the mean for each of these factors for exposed and 



T I Vf 



unexposed children the P values being for - — - — 0-05 >P> 0-01; 



- 0-01 >P> 0-001 ; per cent lymphocytes with granules F< 0-001, 



Index 1 P<0-001, Index2 P<0-001. 



41 



