[eastexsteve]

This year’s batch has been proven to be ineffective against the strain that’s been most common this season.

Wrong. Flu vaccines are rarely a perfect match, but they don't have to be in order to be effective. Please fee free to read up on the subject at:

http://www.cdc.gov/flu/about/qa/flushot.htm

There is little evidence of their [Flu shots] effectiveness. $$$$$$$$$

I don't know whose biology book you have been reading, but you need to take it back for a refund.

[Black Agnes]

http://sharylattkisson.com/govt-researchers-flu-shots-not-effective-in-elderly-after-all

http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6342a3.htm?s_cid=mm6342a3_w

"Sequence analysis (3) of the HA1 portion of the hemagglutinin gene showed 99% homology to typical H3N2 strains circulating in the United States and worldwide during the 2013–14 northern hemisphere influenza season and were found to be antigenically similar to A/Texas/50/2012 (4). Ninety-nine of 102 USS Ardent crew members, 24 of the 25 with ILI symptoms, and 17 of 18 crew members with confirmed influenza A (H3N2) infection had received the 2013–14 influenza vaccine ≥3 months before the outbreak."