Final answer:
Leukopenia is a condition characterized by a decrease in white blood cells. This condition weakens the body's immune system, making it less effective in fighting off infections.
Step-by-step explanation:
Leukopenia is a condition characterized by a decrease in white blood cells. White blood cells, also known as leukocytes, are a major component of the body's immune system. They protect the body against invading microorganisms and mutated cells.
When someone has leukopenia, their body's ability to fight infection is compromised. With fewer white blood cells, the immune system is less effective in defending against pathogens like bacteria, viruses, and fungi. This increases the risk of developing infections and illnesses.
For example, people with HIV who experience leukopenia have a weakened immune system, making it harder for their bodies to fight off infections. This highlights the importance of having an adequate number of white blood cells for a strong immune response.