The answer is D. Tetanus.
Malaria, plague, and dengue are all vector-borne diseases, meaning they are spread by insects. Tetanus, on the other hand, is a bacterial infection that is not spread by insects.
Malaria is caused by a parasite that is transmitted to humans through the bite of an infected Anopheles mosquito. The parasite attacks red blood cells, causing fever, chills, and anemia. Malaria is a major public health problem in many parts of the world, particularly in sub-Saharan Africa.
Plague is caused by a bacterium that is transmitted to humans through the bite of an infected flea. The bacterium can also be spread through contact with infected animals or their tissues. Plague can cause a number of different symptoms, including fever, chills, headache, and swollen lymph nodes. In severe cases, plague can lead to pneumonia, meningitis, and septic shock.
Dengue is caused by a virus that is transmitted to humans through the bite of an infected Aedes mosquito. The virus can cause a number of different symptoms, including fever, headache, muscle aches, and rash. In severe cases, dengue can lead to dengue hemorrhagic fever, a life-threatening condition.
Tetanus is caused by a bacterium that enters the body through a wound. The bacterium produces a toxin that can cause muscle stiffness, spasms, and difficulty breathing. Tetanus can be fatal, but it is preventable with vaccination.