Not sure if this will help at all but I copied this from the MU report in the section where it explains how to do it in AC. This is specifically for NQF 0038 under the CQM Required/Alternate Core.
"To meet any and all parts of this criteria, enter the medically appropriate vaccinations in the "HM: Immunizations and Shots" tab of Decision Support."
You might also consider that perhaps the patients you entered didn't meet the age requirements or possibly the date range of your report might be the problem. I am no expert at MU just trying to give some suggestions.