RT Journal Article SR Electronic T1 Review: vaccination reduces the incidence of serologically confirmed influenza in healthy adults JF Evidence Based Nursing JO Evid Based Nurs FD BMJ Publishing Group Ltd and RCN Publishing Company Ltd SP 47 OP 47 DO 10.1136/ebn.8.2.47 VO 8 IS 2 YR 2005 UL http://ebn.bmj.com/content/8/2/47.abstract AB