Carl Zimmer, New York Times, October 15, 2015. http://mobile.nytimes.com/2015/10/20/science/editing-of-pig-dna-may-lead-to-more-organs-for-people.html?_r=0
Each year thousands of people wait for a transplant organ. Pig organs have long been thought of as a potentially limitless source of transplant organs but research was slowed in 1998 when scientists discovered that the pig genome contains viral DNA that can infect and alter human cells. This obstacle may have recently been overcome when a single CRISPR/Cas9 system was used to alter 62 pig genes to deactivate this viral DNA. With further research gene editing technology could finally create the limitless supply of transplant organs needed.