In a murine model, the administration of aerosolized Lactobacillus rhamnosus significantly reduced lung metastasis when compared to the group of mice that had been administered saline solution [93]; previously, it has been reported that intranasal inoculation of L. rhamnosus in mice decreases IL-6 levels at the pulmonary level and protects against infection by influenza viruses [81]. Here, IL6 is linked to infection.