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. 2019 Aug 6;10:1689. doi: 10.3389/fimmu.2019.01689

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Copyright © 2019 Toman, Celer, Kavanová, Levá, Frolichova, Ondráčková, Kudláčková, Nechvátalová, Salat and Faldyna.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Viral load in different compartments. Groups of 5 piglets were immunized i.m with inactivated vaccine A1 (Progressis) or A2 (Suivac PRRS-In) at intervals D0 and D21. Groups of 5 piglets were immunized i.m with modified live vaccine B3 (Amervac PRRS) or B4 (Porcilis PRRS) at interval D21. All animals were infected with a challenge virus on D42, including the group of control non-immunized piglets (C5). Viral load was measured by quantitative real-time-PCR. (A) Viral load in sera, (B) oral fluids, (C) fluid from bronchoalveolar lavages, and (D) feces. *statistically significant difference (p < 0.05) from control group.