Do not forget to take your anti-malarial tablets during and after your visit. Malaria is a very serious illness which can cause death if not treated. If you have forgotten to bring your tablets or if you run out while you are in Kenya, please speak immediately to one of the duty staff, who will advise you as to where you can buy some.
Also to prevent malaria, please apply insect repellent to any exposed areas of skin. Wearing long sleeves and trousers/skirts at dusk will also help keep mosquito bites to a minimum. Certain anti-malarial treatments can increase susceptibility to sun burn. You should in any case use sun block to avoid burning in strong sunlight.