Porcine circovirus-associated diseases (PCVAD) are a group of illnesses affecting pigs, primarily caused by the porcine circovirus (PCV). This virus can lead to various health issues, including post-weaning multisystemic wasting syndrome (PMWS), which results in weight loss, poor growth, and immune system suppression in affected pigs. PCVAD can also cause other conditions such as porcine dermatitis and nephropathy syndrome (PDNS) and respiratory diseases. The impact of these diseases can be significant for pig farmers, leading to economic losses due to decreased productivity and increased veterinary costs. Vaccination and good management practices are essential for controlling PCVAD.