Influenza A, Puerto Rico 8/34 (H1N1), Bangkok 1/ 79 (H3N2), Matrix Protein

May be stored at 4 °C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20 °C. Aliquots are stable for 12 months. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.