Kenya has areas with high altitude (higher than 2400m) and areas with very high altitude (higher 3658m). The highest point in Kenya is Batian, the highest peak of Mount Kenya, which is 5199m above sea level. If you are travelling to areas of high altitude, you should be aware of the risks and take care to avoid adverse effects of being at a high altitude such as Acute Mountain Sickness, which can be a life-threatening condition.
Dengue fever is a viral illness that is spread to humans by mosquitoes, which are more active during the day and common in urban areas such as towns and cities. The symptoms of dengue fever include fever, headache, and joint, bone and muscle pain. There is currently no vaccine against dengue fever, so you will need to practise insect bite avoidance to protect yourself.
Schistosomiasis, sometimes called snail fever or bilharzia, is a parasitic infection that can be spread to humans through contact with fresh water contaminated with the parasite. The parasite enters the body through the skin and infect the urinary tract or intestines. Symptoms of schistosomiasis include abdominal pain, diarrhoea and can sometimes lead to serious health complications such as bladder cancer. To prevent catching this disease you should avoid swimming, bathing or paddling in freshwater, including lakes and streams.