Influenza vaccination for the elderly appears to be most effective against complications in long-term care facilities, but the usefulness of vaccines in the community may be modest Vaccines for Preventing Influenza in the Elderly.
On average, BCG vaccine reduces the risk of tuberculosis by 50%. Protection against tuberculous death, meningitis, and disseminated disease is higher than for total cases of tuberculosis, but this result may be due to reduced error in disease classification BCG Vaccine in the Prevention of Tuberculosis.