According to the Whitehead Institute for Biomedical Research, humans are not fit to be cloned. Based on a study of 10,000 genes, humans would most likely die prematurely, get pneumonia, liver failure or be obese because of gene expression abnormalities. The group suggests that cloning to create another human shouldn’t be done because of this. They aren’t including therapeutic cloning in their findings though.
link: Wired News