Jungle Formula A Hospital for Tropical Disease - LondonApproved by the Hospital for Tropical Diseases for travellers visiting areas with a high risk of malaria and other insect transmitted diseases provided that directions for use are followed at all times.The Insect Repellent Factor® is a quick and easy way to choose what repellent you need to protect yourself from mosquitoes. Also available in Kids Lotion (IRF2) and Medium (IRF3).Up to 9 hours of maximum protection* against the most common mosquito species (Culex).For areas with a high risk of malaria and other insect transmitted diseases.For adults and children from 12 years.Up to 9 hours protection* from mosquitoes and biting insects*Factors such as high temperature, humidity and transpiration can influence the duration of protection of all insect repellents. Mosquito & insect protection time: yellow fever mosquito (Aedes Aegypti) 5 hours, malaria mosquito (Anopheles Albopictus) 8 hours, tic