Prevention measures and mitigation, are they the same Thing?

To the best of my knowledge, prevention aims at lowering the probability of risk occurrence. While mitigation aims at lowering the risk impact. For example training your staff how to evacuate in case of a fire that prevent them from being injured. on the contrary buying them health insurance will mitigate the impact in case they were caught by the fire. yet it is worth saying that some references refer to both prevention and mitigation as Treat methodologies .. I.e methodologies with main focus of reducing likelihood