Porcine Circovirus Type 1 (PCV1) is a virus that primarily affects pigs. It belongs to the family Circoviridae and is a small, circular DNA virus. PCV1 is generally considered non-pathogenic, meaning it does not cause disease in healthy pigs. It is often found in pig populations worldwide and can be detected in various tissues. Although PCV1 itself is not harmful, it is important to monitor its presence in swine herds. The more pathogenic Porcine Circovirus Type 2 (PCV2) can cause significant health issues in pigs, including Postweaning Multisystemic Wasting Syndrome (PMWS). Understanding PCV1 helps researchers and veterinarians manage swine health effectively.