The standard of medical provision outside the main cities in Kenya is of a much lower standard than the UK, and should you need to take advantage of it, you will need to ensure that you have adequate travel insurance that covers any activities that you plan to take part in, and allows for medical extraction to the UK.
Malaria is prevalent throughout the country, and at its peak from June - November, during that period, you should ensure that you take anti malarial prophylaxis and insect repellent. You should carry your own sterile surgical instruments and hypodermic needles with you, as HIV transmission due to poor hygiene in hospitals has been reported all to frequently.
As a rule, tap water is not safe to drink, and you should stick to bottled. Avoid taking ice with drinks, as this comes straight out of the tap, and can be contaminated.
