**Improve husbansry as in [[Paramyxoviridae#Parainfluenza -3 (PI-3)|PI-3]]
**Improve husbansry as in [[Paramyxoviridae#Parainfluenza -3 (PI-3)|PI-3]]
−
**Vaccines are available but not effective as need to stimulate cytotoxic T-cells
+
**Vaccines are available but not effective as need to stimulate [[General Pathology - T-cell Activation and Function#Cytotoxic T-Cells|cytotoxic T-cells]]