Malaria is caused by the infection in the body of a parasite called plasmodium, and occurs after being bitten by certain species of mosquito, most commonly found in tropical and subtropical regions of Sub-Saharan Africa, the Americas, and Asia.
Malaria rapidly spreads inside the body, resulting in a heavy fever, and in some cases can even be fatal. It is important that anti-malarial treatment is taken before travelling to malaria zones to prevent infection. Symptoms of infections include a very high fever, nausea, vomiting and require immediate medical attention.
Malaria tablets are the most common form of prevention against malaria when travelling to different countries. They work by preventing parasites from reproducing once they have entered your body.
Depending on the type of malaria tablets being used, they are to be taken at certain intervals either daily or weekly and the course usually starts from as early as 2 to 3 weeks before travel (although more commonly 1 week before travel), and can be stopped usually 4 weeks after leaving the area of travel.