Porcilis PCV M Hyo ID (porcine circovirus and mycoplasma hyopneumoniae vaccine (inactivated)) is a vaccine used to protect pigs from Porcine Circovirus Type 2 (PCV2), and Mycoplasma hyopneumoniae (M. hyo). M. hyo is a common cause of pneumonia in pigs, and this vaccine helps to lessen the severity of lung damage caused by PCV2 and M. hyo.