Yogurt's "good" lactic acid bacteria, Lactobacillus acidophilus, popularly known for their digestive and immune-boosting credentials, are also a highly effective conduit for delivering vaccines directly into the small intestine. Most vaccines are proteins, and, when delivered orally, are broken down by the stomach before they can reach that crucial destination. The NCSU study, which focused on an anthrax vaccine, showed that when the vaccine was able to reach the small intestine intact, it immediately targeted the cells that jump-start the appropriate immune response to protect against anthrax's adverse affects. Yogurt's bacteria, also referred to as "probiotics," can get the vaccine to the small intestine, bypassing the stomach's digestive impact. This vaccine-delivery method will likely work for other vaccines to protect against a variety of viruses and pathogens, and the study's authors are now exploring this.