Overview What is malaria? Malaria is a serious disease that spreads when you’re bitten by a mosquito infected by tiny parasites. When it bites, the mosquito injects malaria parasites into your bloodstream. Malaria is caused by the parasites, not by a virus or by a type of bacterium. If it isn’t treated, malaria can cause […]
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Signs and symptoms Active TB Disease Symptoms of active TB disease depend on where in the body the TB germs are growing. TB germs usually grow in the lungs (pulmonary TB). Active TB disease in the lungs may cause symptoms such as: A bad cough that lasts 3 weeks or longer Pain in the chest […]
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Overview What is HIV? HIV stands for human immunodeficiency virus. HIV infects and destroys cells of your immune system, making it hard to fight off other diseases. When HIV has severely weakened your immune system, it can lead to acquired immunodeficiency syndrome (AIDS). Because HIV works backward to insert its instructions into your DNA, it […]
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Overview Dengue (DENG-gey) fever is a mosquito-borne illness that occurs in tropical and subtropical areas of the world. Mild dengue fever causes a high fever and flu-like symptoms. The severe form of dengue fever, also called dengue hemorrhagic fever, can cause serious bleeding, a sudden drop in blood pressure (shock) and death. Millions of cases […]
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