Fig. 4

Simulated sampling distribution histogram of PRRSV outbreak economic losses on a 2,400-sow farm. AÂ An outbreak of PRRSV infection on a provisional PRRSV-negative farm. BÂ An outbreak of PRRSV infection on a stable PRRSV-positive farm. The red line is the cumulative probability density curve. The red rectangle is the frequency distribution histogram of economic losses caused by PRRSV infection. PRRSV, porcine reproductive and respiratory syndrome virus