Given the question: Q: What happens when when the immune system does not work properly? Read this paragraph and choose the correct option from the provided answers: Immunodeficiency occurs when the immune system is not working properly. As a result, it cannot fight off pathogens that a normal immune system would be able to resist. Most commonly, immunodeficiency diseases occur when T or B cells (or both) do not work as well as they should, or when your body doesn't produce enough antibodies. Choices: - anemia - diabetes - stroke - immunodeficiency A:
The answer is:
immunodeficiency