1. Bacterial Infections

Bacterial infections occur when harmful bacteria enter the body and multiply, often taking advantage of a weakened immune system. In people with immunodeficiency—due to conditions like HIV, certain cancers, or immunosuppressive treatments—the body struggles to fight off these infections. This can lead to more severe or frequent illnesses. Common bacterial infections include pneumonia, skin infections, and urinary tract infections. Managing these infections often requires antibiotics, and it's crucial for individuals with weakened immunity to take preventive measures and seek prompt medical care when they show symptoms.