It is not recommended to let undewormed kittens sleep on a bed. This is because kittens' fur may harbor bacteria, fungi, and some parasites and their eggs. If they sleep on a bed, it is easy for these bacteria, fungi, or parasites to infect humans.

However, if it is a domesticated kitten that has been raised in a home environment since birth and has never been outside, you can consider letting it sleep on the bed.