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Malaria is a serious and sometimes fatal disease caused by a parasite that commonly infects a certain type of mosquito which feeds on humans. People who get malaria are typically very sick with high fevers, shaking chills, and flu-like illness. Although malaria can be a deadly disease, illness and death from malaria can usually be prevented.

Treatment of Severe Malaria is described on the CDC webpage:

The classical (but rarely observed) malaria attack lasts 6–10 hours.