CHARLOTTE, N.C. — Scientists are testing what could be one of the biggest medical breakthroughs in history: the "stress vaccine."

Researchers at the University of Colorado say a bacteria found naturally in dirt could help reduce stress and anxiety levels in humans by reducing the body's reaction to stressful situations. 

“We think there is a special sauce driving the protective effects in this bacterium, and this fat is one of the main ingredients in that special sauce,” said senior author and Integrative Physiology Professor Christopher Lowry.

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The vaccine has only been tested on mice so far, but if approved, scientists say it could be provided to people with high-stress jobs, such as first responders and soldiers. They believe it could help those individuals from developing PTSD.

According to a report in the Denver Post, Lowry said the treatment is still 10 to 15 years away from being ready. He also said the same strain of bacteria has been studied in clinical trials for other conditions and has a good safety record.