Fig. 4From: A descriptive study on spatial and temporal distributions of genetic clusters of porcine reproductive and respiratory syndrome virus infecting pig sites in Quebec, Canada, between 2010 and 2019Number of pig sites for each of the 32 wild-type clusters according to year. A total of 1653 PRRSV ORF5 sequences from 693 pig sites in Quebec, Canada, were classified into 32 wild-type clusters for the study period (2010–2019). The number of sites in which the cluster was detected is shown between parenthesesBack to article page