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. 2022 Jun 14;9:884733. doi: 10.3389/fvets.2022.884733

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Copyright © 2022 Cheng, Campler, Schroeder, Yang, Mor, Ferreira and Arruda.

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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Porcine reproductive and respiratory syndrome virus (PRRSV) positive rate (%) in processing fluid and tonsil scraping specimens by stillborn fetus (%), mummified fetus (%), and pre-weaning pig death rates (%) in three breeding farms. ^aFarm 1. Latest PRRSV outbreak, ~6 months prior to the first sampling event. ^bFarm 2. Latest PRRSV outbreak, <1 month prior to the first sampling event. Vaccinated with a modified live vaccine (Fostera® PRRS, Zoetis Inc). ^cFarm 3. Vaccinated with a modified live vaccine (Ingelvac PRRS® MLV, Boehringer Ingelheim).