historic black and white photo of a large warehouse space filled with hospital beds, patients and providersWith a look back at the 1918 flu pandemic, Bryn Nelson (@SeattleBryn) asks what lessons we might draw from that pandemic for facing COVID-19 today. His story for the journal Cancer Cytopathology’s CytoSource column shows how measures like mask mandates have saved lives before — and how leadership and consistent messaging can still make a difference. Image: Otis Historical Archives, National Museum of Health and Medicine