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Table 2 Administration of pre-exposure antiviral prophylaxis by occupational risk category comparing different risk assessment approaches used in incident I and incident II.

From: Limiting worker exposure to highly pathogenic avian influenza a (H5N1): a repeat survey at a rendering plant processing infected poultry carcasses in the UK

Occupational risk group Total worker population At risk population in receipt of intervention Absolute difference
  N Incident I Incident II P2 - P1
   n % (P1) n % (P2)  
A (high risk) 37 17 46 15 41 -5
B (medium risk) 17 12 71 9 53 -18
C (low risk) 35 18 51 24 69 17
D (negligible risk) 68 25 37 7 10 -26
TOTAL 157 72 46 55 35 -11