FLU-VACS Comparative Study in Adults

Summary

The purpose of this study is to compare 2 licensed flu vaccines to each other and to placebo (inactive substance). The study will be conducted among healthy adult participants aged 18-49 years and is expected to last 3 years. During year 1, participants will be assigned to receive 1 of the 2 licensed flu vaccines or placebo, given as either nasal spray (live-attenuated vaccine or placebo) or injection (inactivated vaccine or placebo). Participants will receive the same assigned vaccine or placebo during year 2. During year 3, participants will be followed, but will not receive flu vaccine. Each year blood samples will be collected before and 1 month after each vaccination and at the end of each flu season in order to measure how the body responds to the vaccine and how well participants were protected from the flu. During the flu season, participants with flu-like illness will provide information on symptoms and provide a throat swab to test for virus identification.

Timeline

Start

2004-10

Primary completion

2007-07

Completion

2007-07

Publications

• Results Ohmit SE, Victor JC, Rotthoff JR, Teich ER, Truscon RK, Baum LL, Rangarajan B, Newton DW, Boulton ML, Monto AS. Prevention of antigenically drifted influenza by inactivated and live attenuated vaccines. N Engl J Med. 2006 Dec 14;355(24):2513-22. doi: 10.1056/NEJMoa061850.
• Results Ohmit SE, Victor JC, Teich ER, Truscon RK, Rotthoff JR, Newton DW, Campbell SA, Boulton ML, Monto AS. Prevention of symptomatic seasonal influenza in 2005-2006 by inactivated and live attenuated vaccines. J Infect Dis. 2008 Aug 1;198(3):312-7. doi: 10.1086/589885.
• Petrie JG, Ohmit SE, Johnson E, Cross RT, Monto AS. Efficacy studies of influenza vaccines: effect of end points used and characteristics of vaccine failures. J Infect Dis. 2011 May 1;203(9):1309-15. doi: 10.1093/infdis/jir015. Epub 2011 Mar 4.

Drugs

Indications