Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. New Research Suggests Digestive Tract Bacteria Affect Coronavirus Severity VOA News A new study indicates the kind of bacteria found in a person's digestive tract can affect the severity of coronavirus infections and the body's immune response. The study, conducted by researchers at the Chinese University of Hong Kong and published Monday in the medical journal Gut, shows there is growing evidence that the health of the human gastrointestinal tract, or gut, has direct influence on the immune system and hence its response to infections like the coronavirus. The researchers examined 100 patients who had tested positive and divided them by the severity of their cases. Through blood and stool testing, the researchers compared the microbiome in their tracts with patients without coronavirus infections. .