It's already been used in larger animals. http://www.nature.com/nprot/journal/v9/n8/full/nprot.2014.13...
I know there is one paper that describes curing a liver disease (in a mouse I think) using CRISPR-CAS but I can't find the reference right now.
I know there is one paper that describes curing a liver disease (in a mouse I think) using CRISPR-CAS but I can't find the reference right now.