4. Parasitic Infections

Parasitic infections occur when tiny organisms like worms, protozoa, or insects invade the body, often taking advantage of weakened immune systems, such as in people with HIV/AIDS or other immunodeficiencies. These infections can lead to serious health problems since the body struggles to fight them off. Common examples include malaria, caused by a parasite transmitted through mosquito bites, and intestinal worms, which can be contracted through contaminated food or water. Proper diagnosis and treatment are essential, as a strong immune response is crucial for recovery and avoiding complications from these infections.