Hi Cathy, I think the daily WBcorQC for the ECHO is similar to the test run on the Galileo, and that doesn't have a strength of reaction to be graded. I personally find this test fairly meaningless. Ask yourself what is actually being tested by running this control? It would be safer to run 'bog standard' A, B, O controls that give you clear blood group interpretations that everyone understands. However, as this is a recognised control for the analysers, and failure of this would, I presume, prevent the equipment from working (??) until an accepted test is passed you would need to continue using it (unless you risk assessed this). We currently use whole blood ABO Albacheck controls as recommended by Immucor (UK). Also run our own weak antibody controls (anti-Fya, -S) in addition, even though Immucor say this isn't necessary as each 3 cell screen has a pre-bound control on the end ( saying that I have NEVER seen this pre-bound control fail). Question all the controls that you will running (or not) on this equipment until you understand and are happy with exactly what reagent and part of the test is actually being controlled.