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 highly contagious and can spread through direct contact between pigs or indirectly through contaminated equipment and environments. Vaccination and good management practices are essential for controlling the spread of the virus and minimizing its impact on pig farming.