Figure 2From: Emergency vaccination alleviates highly pathogenic porcine reproductive and respiratory syndrome virus infection after contact exposureMicroscopic examination of infected lungs compared with the healthy ones on 21 DPI. Hematoxylin- and eosin- stained sections of lungs in pigs from Group1 (a), Group 2 (b), Group 3 (d) and Group 4 (c) on 21 DPI. Images were obtained on an Olympus BX-50 light microscope at 200-fold original magnifications.Back to article page