DIAGNOTransfer Tube contains 3 mL of viral nucleic acid extractive and preservative liquid. When clinical specimens suspected of respiratory tract infection are transferred in this tube, the liquid inside the tube can be used directly in real-time PCR (qPCR) reactions. The nucleic acid extractive and protective liquid inactivate all viral, bacterial, or eukaryotic pathogens in the sample 5 minutes after contact with the clinical specimen.