ATLANTA, Jan 30: The flu isn’t the only illness adults should be immunized against, US health officials said on Tuesday, as a new study found current adult vaccination rates in the country “unacceptably low.” The report by the Centers for Disease Control and Prevention (CDC) concluded that a “substantial increase” in adult vaccinations is needed to prevent diseases including pneumonia, tetanus, diphtheria, hepatitis, shingles and whooping cough. (agencies)