Porcine circovirus (PCV) is a small virus that primarily affects pigs. It belongs to the family Circoviridae and is known to cause various diseases in swine, particularly porcine circovirus-associated disease (PCVAD). The virus can lead to symptoms such as weight loss, respiratory issues, and skin lesions, impacting the health and productivity of affected animals. PCV is transmitted through direct contact with infected pigs or contaminated environments. Vaccination has become a common preventive measure in pig farming to control the spread of the virus. Understanding and managing PCV is essential for maintaining the health of pig populations and ensuring the success of the swine industry.