Are there racial disparities with sepsis?

Yes. Aftrican americans have higher incidences of sepsis/shock, lower survival rates; it is not clear exactly what the cause is (higher rates of uninsured, poorer/overburdened hospitals in the areas that serve them, indifference or racism by physicians/hospital staff, poorer self care and more reluctance to use the healthcare system). Its likely that all of those play a role.
Yes. African americans and nonwhites have been shown in some studies to have higher rates of sepsis than whites.