Ans- Malaria is caused by a single-celled eukaryotic microorganism called protozoa. Specifically, the parasitic Plasmodium genus is responsible for this disease. Mainly Plasmodium falciparum and Plasmodium vivax are responsible for malaria in humans out of the six Plasmodium species. Malaria leads to significant morbidity and economic downfall. Pregnant women, children, old aged people and travellers from non-malarial regions are more prone to malaria. The symptoms of malaria include fever and flu-like sickness accompanied by shaking chills, muscle pain, headache, and tiredness. Nausea, vomiting, and diarrhoea may also occur alongside. Malaria may also cause anaemia and jaundice because of the heavy loss in the RBC count. The patient should be treated with antimalarial drugs.