They may be thinking of Bio-Safety Level (BSL) 4 Personal Protective Equipment (PPE). The CDC has suggested nCOV-2019 be investigated/treated with BSL 2 PPE. Li

They may be thinking of Bio-Safety Level (BSL) 4 Personal Protective Equipment (PPE). The CDC has suggested nCOV-2019 be investigated/treated with BSL 2 PPE. Links to the CDC guidelines and a doc outlines what constitutes BSL 2 are below. * https://www.cdc.gov/coronavirus/2019-ncov/lab/lab-biosafety-guidelines.html https://www.cdc.gov/coronavirus/2019-ncov/lab/lab-biosafety-... * https://www.wm.edu/offices/sponsoredprograms/_documents/ppe_matrix_ibc.pdf https://www.wm.edu/offices/sponsoredprograms/_documents/ppe_...