http://articles.mercola.com/sites/articles/archive/2001/08/04/sunlight-part-one.aspxSeasonal variation in infectious disease outbreaks may be related to changes in host susceptibility mediated by the annual light/dark cycle and patterns of melatonin secretion, according to a novel theory proposed by Dr. Scott F. Dowell. Dr. Dowell, ofenCommunityServer 2008.5 SP1 (Build: 31106.3070)http://articles.mercola.com/sites/articles/archive/2001/08/04/sunlight-part-one.aspx#190921Mon, 27 Apr 2009 20:27:42 GMT24451277-a5aa-4add-96dc-64081bfd86fa:190921ExZonie<p><a rel="nofollow" target="_new" href="http://www.medicalnewstoday.com/articles/51913.php">www.medicalnewstoday.com/.../51913.php</a></p> <p>Main Category: Flu / Cold / SARS</p> <p>Also Included In: Immune System / Vaccines; &nbsp;Public Health</p> <p>Article Date: 15 Sep 2006 - 0:00 PDT</p> <p>...</p> <p>Four years ago, I became convinced that vitamin D was unique in the vitamin world by virtue of three facts. First, it&#39;s the only known precursor of a potent steroid hormone, calcitriol, or activated vitamin D. Most other vitamins are antioxidants or co-factors in enzyme reactions. Activated vitamin D - like all steroid hormones - damasks the genome, turning protein production on and off, as your body requires. That is, vitamin D regulates genetic expression in hundreds of tissues throughout your body. This means it has as many potential mechanisms of action as genes it damasks.</p> <p>Read the whole thing!!</p> <img src="http://articles.mercola.com/aggbug.aspx?PostID=190921" width="1" height="1">