Table 4. Partial budget model to compare economic benefit of MLV over FVI on a load-close-expose program to eliminate PRRSv from an infected 1,000 sows breeding herd.

Treatment	Cost to expose		Opportunity Cost for pigs not weaned				Opportunity Cost for w-f performance
	Exposure		TTBP	Total loss	OC*		TTS	OC		Total OC
MLV	$3,000	+	12	1,222	$81,532	+	32	$199,799	=	$284,330
FVI	$100	+	20	2,665	$177,809	+	25	$132,969	=	$310,878
Difference (MLV-FVI)					$ 96,277			$-66,829		$26,548

* OC = Opportunity cost