The hematological diseases, such as various blood disorders, significantly impact the body’s immune response. These conditions weaken the immune system through various mechanisms, leading to an increased risk of infections for patients. As a result of the deterioration of immune function, hematological patients are much more susceptible to infections caused by various pathogens than healthy individuals. Causes of Increased Infection Susceptibility in Hematological Patients The aim of this article is to present the underlying causes of increased infection susceptibility in hematological patients, as well as the types of infections that most commonly occur in their cases. Hematological conditions such as leukemia or lymphoma affect the functioning of the bone marrow…