In this webinar, Candace Blancett, M.S., US Army Medical Research Institute of Infectious Diseases (USAMRIID), will present her work on preparing and quantifying pathogenic viruses for electron microscopy in Biosafety Laboratory (BSL) 3-4 settings. Topics will include negative staining of pathogenic viruses1 and virus quantification using STEM2. Using mPrep/g capsules to eliminate grid handling in the BSL 3-4 suite resulted in easier, safer processing and more reproducible sample preparation.