PPV

Noun

 * , a virus causing reproductive failure of swine.
 * 1)  A positive pressure ventilation machine, a PPV device
 * , a virus causing reproductive failure of swine.
 * 1)  A positive pressure ventilation machine, a PPV device
 * 1)  A positive pressure ventilation machine, a PPV device
 * 1)  A positive pressure ventilation machine, a PPV device