I don't think it is easy to qualify and clearly we all need a more precise definition to be able to answer this adequately. According to the CDC website on the "immunocompromised page" http://wwwnc.cdc.gov/travel/yellowbook/2010/chapter-8/immunocompromised-traveler.aspx Diabetes falls under the category of "Chronic Conditions Associated with Limited Immune Deficits". If you look further down the page, they list vaccine forms and which individuals (such as those with full blown cases of HIV) should not receive them. Individuals with Diabetes can get all EXCEPT for the live flu vax. Still, I don't think it is entirely appropriate to reprimand people for their use of the word when even the CDC feels that the label is appropriate, however mildly!