nothing. you may want to look into anti-malarial tablets should you venture further inland into the jungle area, but nothing else is required for Malaysia or KL. PS - if you can, don't spend too long in KL but explore the rest of the country - its beautiful and KL, while nice and interesting, is just another big city.
Thanks Bobbobbely, Hope I got that right.
Will definiatly try to explore a bit more of the country. Thank you for responding so quickly to my question.
Ellie