The Viogene® miTotal RNA Extraction Miniprep System provides a fast method to purify total RNA from various samples such as cells from culture, tissues, whole blood, plasma, serum, biological fluids containing RNA virus, etc.. A simple spin-column based method can isolate large RNAs, siRNAs, microRNAs, and viral RNAs without the time-consuming procedure of phenol/chloroform extraction and ethanol precipitation.