Suvaxyn CSF Marker (Live Recombinant E2 gene deleted Bovine Viral Diarrhoea Virus containing Classical Swine Fever E2 (CP7_E2alf)) is used to protect pigs against classical swine fever (CSF), a highly contagious and often fatal viral disease of pigs, causing fever, skin lesions, and neurological signs. It''s a live marker vaccine that allows for differentiation between vaccinated and naturally infected pigs.