Some of the biospecimens collected during the Ebola outbreak were likely preserved by formalin-fixation and embedding in paraffin. This method of preservation allows tissues to be prepared into FFPE tissue blocks, suitable for thin sectioning by microtome for morphological and molecular analysis. What are advantages of this format? Universal application in clinical pathology Considered best format for preserving proteins, RNA, DNA Provides optimal morphological preservation It is the optimal fixation technique for fatty tissues and thick pieces of tissue