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Paper of the Month December 2012

The safety and effectiveness of self-administrationi of intranasal live attenuated influenza vaccine in adults

Vaccine.  2012. Dec 19 [Epub ahead of print].


Christopher S. Ambrose and Xionghua Wu


Intranasal live attenuated influenza vaccine (LAIV) has potential for self-administration (SA) by adults and adolescents, which could save time and cost in mass vaccination settings. Participants in a study of LAIV in adults (n=4561) selected either SA or health care provider (HCP) administration and were followed for febrile illness during the influenza season. More LAIV recipients chose SA-LAIV (72%) than HCP-LAIV (28%). Overall, 97% of SA-LAIV and 98% of HCP-LAIV recipients had no problems with vaccine administration. Four of 13 study sites enrolled more than 50 subjects in both cohorts. Overall and for these 4 sites, illness incidence was similar with SA-LAIV and HCP-LAIV. Solicited reactogenicity events and adverse events through 7 days post vaccination were comparable for SA-LAIV and HCP-LAIV recipients; both groups exhibited increased runny nose, sore throat, and cough relative to placebo recipients. SA-LAIV and HCP-LAIV appeared similarly effective against influenza-like illness and had comparable safety profiles.