. 2018 Dec 28;13(12):e0209784. doi: 10.1371/journal.pone.0209784

Table 2. Mean number of days vaccinated, challenged pigs were pyrexic compared with non-vaccinated pigs post-challenge.

Treatment Group	PRRSV challenge dose (log₁₀TCID₅₀/mL)	Estimated mean number of days pyrexic
Treatment Group	PRRSV challenge dose (log₁₀TCID₅₀/mL)	No challenge	1	2	3	4
PRRS Type 2 MLV		1.8	1.4^*	1.0^*	4.2^*	4.4^*
Non-vaccinated challenge control		-	6.0	10.0	8.8	11.2

*Statistically significant difference (P <.05) in number days pyrexic between Type 2 PRRS. MLV and challenge control groups based on model prediction.

MLV = modified-live vaccine; PRRS = porcine reproductive and respiratory syndrome; PRRSV = porcine reproductive and respiratory syndrome virus; TCID₅₀ = 50% tissue culture infectious dose