Cross-reacts with type 2. Minimal reactivity with type 1. Some cross-reactivity with bovine parainfluenza-3 and canine parainfluenza. Does not react with HEp-2 cells by indirect immunofluorescence.

Short-term (up to 6 months) store at 2-8°C. Long term, aliquot and store at -20 °C. Avoid multiple freeze/thaw cycles.