I highly recommend that you first read the article on the Dherbs.com website written about the so-called swine flu. Here is a link below that you can follow to go directly to read the article. "Vitamin D", is a term for the collective group of fat-soluble prohormones which includes that of D3. There has been research stating that Vitamin D serves as an important regulator of immune system responses. That being said, I also recommend that you check out the following all natural, plant-based formulas that you can purchase from Dherbs.com, Vitamin D Formula, Immune Support, and Vitamin C formula. These can all be beneficial to building a strong immune system so as to be proactive in your maintaining your health!

Immune Formula
Vitamin C
Vitamin D