Porcine circovirus type 2 (PCV2) is a virus that primarily affects pigs, leading to various health issues. It is a small, circular virus belonging to the Circoviridae family and is known to cause porcine circovirus-associated diseases (PCVAD), which can result in weight loss, respiratory problems, and even death in severe cases. The virus is highly contagious and can spread through direct contact between pigs or indirectly through contaminated equipment and environments. Vaccination has become a common preventive measure in pig farming to control the spread of PCV2 and reduce its impact on swine health and production.