For more information on the CIV vaccine please read the following articles:
http://www.cdc.gov/flu/canine/
http://www.doginfluenza.com/pdfs/MISC9.pdf
http://mobile.vetlearn.com/Media/images/pdf/2010/PV/PV0610_hilling_CE.pdf
https://www.avma.org/KB/Resources/Backgrounders/Pages/Canine-Influenza-Backgrounder.aspx