Dubai: The Dubai Health Authority has urged residents travelling to tropical countries where malaria is prevalent to take precautions against mosquito bites, warning that the disease is transmitted through infected mosquitoes.Marking World Malaria Day, the authority outlined three key preventive measures: using insect repellent, wearing protective clothing to reduce skin exposure, and sleeping under insecticide-treated bed nets, particularly in high-risk areas.Get updated faster and for FREE: Download the Gulf News app now - simply click here.The authority also advised travellers to consult a doctor four to six weeks before departure to receive appropriate medical guidance and prescribed preventive medication based on their destination and length of stay. Early preparation, they said, can significantly reduce the risk of infection.It noted that malaria symptoms can range from mild to severe and may include fever, chills, sweating, headache, body aches, fatigue, and nausea or vomiting.