A mixed cell exudate will be present in the airway lumen and substantial lymphoid tissue will be present around the airways. The alveolar walls may be thickened with [[Lymphocytes - Introduction|lymphocytes]]. | A mixed cell exudate will be present in the airway lumen and substantial lymphoid tissue will be present around the airways. The alveolar walls may be thickened with [[Lymphocytes - Introduction|lymphocytes]]. |