Malaria is a common occurrence in Sub-Sahara Africa, parts of South America, India, and the South Pacific. It is spread by the female anopheles mosquito. Symptoms of malaria can include fever, chills, and flu-like symptoms. If untreated, malaria can lead to death. The US Centers for Disease Control (CDC) and the World Health Organization (WHO) have several good resources to provide malaria education.
You can help protect yourself from mosquito bites (that cause malaria) by wearing clothing treated with insect repellent. A popular line of clothing called “BuzzOff” is available or you may treat your own clothing with a chemical called permethrin. This is also effective on mosquito nets and curtains. The figure below from Travel MedicineCDC article