It's a bit different than the flu vaccine, but about 4 years ago I began taking enough D3 to keep my testing levels between 60 to 70ng/ml year round. I've only had one cold since then.
I've seen a few article on how the sunshine vitamin can help fend off a cold. With flu season not far away, might be another item worth looking at.
http://www.drbriffa.com/2010/06/28/higher-vitamin-d-level-linked-with-reduced-risk-of-infection/
http://www.huffingtonpost.com/bill-gottlieb/the-easiest-way-to-preven_b_651576.html
http://www.vitamindcouncil.org/newsletter/h1n1-flu-and-vitamin-d.shtml
I've seen a few article on how the sunshine vitamin can help fend off a cold. With flu season not far away, might be another item worth looking at.
http://www.drbriffa.com/2010/06/28/higher-vitamin-d-level-linked-with-reduced-risk-of-infection/
http://www.huffingtonpost.com/bill-gottlieb/the-easiest-way-to-preven_b_651576.html
http://www.vitamindcouncil.org/newsletter/h1n1-flu-and-vitamin-d.shtml