@jaynep I'm sorry to hear about your son having the immune disorder. I never had that error again in my blood work BUT......as things move forward I am just now, many years later, getting some odd blood tests with immune disorders as a possibility, so perhaps it was just an early warning? Unfortunately, I've had many viral diseases over the recent years (too little immune or too much, hard to tell at this point). The virus that was a 'game changer' for my health was Mono (as an adult). It impacted my health at the time and seems to be hanging around. Hugs to you and best wishes to your son.