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

Table 1. Study design for a randomised, blinded, vaccination-challenge study.

Group PRRS Type 2 MLV vaccinated pigs
(n)		 Non-vaccinated challenge control pigs
(n)		 PRRSV challenge dose
(log10TCID50/mL)
1 10 10 <1.5
2 10 10 2
3 10 10 3
4 10 10 4
5 10 5* None

*Necropsied on Day 28 (day of challenge)

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