Increasing exposure to Mycobacterium vaccae could be beneficial for various groups of people, based on its potential health benefits:Individuals Experiencing Stress: Given its potential to enhance stress resilience, individuals facing high levels of stress might benefit from activities that increase exposure to this bacterium.People with Mood Disorders: As Mycobacterium vaccae has been linked to improved mood and psychological well-being through its interaction with serotonin pathways, those suffering from depression or anxiety could consider ways to increase their exposure.