Benoit Wallaert spends much of his time researching Immunology, Internal medicine, Pathology, Bronchoalveolar lavage and Lung. Benoit Wallaert interconnects Gastroenterology and Endocrinology in the investigation of issues within Internal medicine. His Pathology study integrates concerns from other disciplines, such as Dermatology and VCAM-1.

His work in Bronchoalveolar lavage tackles topics such as Receptor which are related to areas like Transforming growth factor, Glucocorticoid and Cell. His Lung research is multidisciplinary, incorporating elements of Autoantibody, Pulmonary function testing and Myositis. His studies deal with areas such as Pulmonary fibrosis, Lymphocytic interstitial pneumonia and Intensive care medicine as well as Idiopathic pulmonary fibrosis.