Lemurs are pretty hardy and can put up with cold weather, below 40 degrees, but they are not from the Arctic Circle, they're from the rain forests. This is a strong material that will support itself and keep most small children's fingers out. Additionally, I strongly recommend raising the cage at least 2 feet above the ground to minimize parasites. Worming Standard worming for dogs or cats apply. Also, be sure you have a vet that knows about lemurs, an emergency is not the time to look for for one.
Vaccines Go on the advice of a good vet who knows primates.
Vaccinations depend on what is endemic to your area. You may also want to consult with your nearest zoo. This paper is, by far, only an introduction to the care of lemurs.