Case Presentation: A 67 year old patient (she/her) with mitral valve prolapse was admitted in mid-August for acute hypoxic respiratory failure. She was at baseline health until 14 days prior to admission, when she developed fever, malaise, and generalized weakness. Outpatient bloodwork revealed new pancytopenia (WBC 3.9 x 10^9/L, Plt 66 x 10^9/L, Hgb 11.2 [...]