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Table 1 Proportion of PRRSV positive farms amongst all farms and according to different vaccination status, 16 farms were classified as dubious and were excluded from further analysis

From: Risk factors for porcine reproductive and respiratory syndrome virus infection and resulting challenges for effective disease surveillance

  N Number of positive (%) 95 % Confidence Interval
All farms 131 46 (35.1) 26.8-43.4
Non-vaccinated 84 16 (19.5) 10.4-27.6
Vaccinated: 47 30 (63.8) 49.5-78.1
 Live vaccine 39 28 (71.8) 57.0-86.5
 Killed vaccine 8 2 (25.0) 13.7-63.7