I mentioned an ESR test higher up in this thread. Discussing and trying to get diagnostic tests. While it might not be officially a diagnostic test, there are doctors in New York who do use ESR with a few other tests to be sure the patient has ME. At any rate my ESR was 2 when it was tested a few months after I got sick. Interestingly a few months after I got sick my white blood cell count was very healthy, apart from a slight drop in lymphocytes. I found this ESR in my medical records last month and was surprised my GP had originally ordered it, possibly he suspected a low ESR for ME patients, but he never mentioned it at the time if he did.