There is no cure now for porcine reproductive and respiratory syndrome (PRRS), a disease that causes breathing problems in pigs and kills piglets and unborn litters. But genetic engineering may be the solution, The Guardian reports. Using CRISPR, scientists removed an area of DNA linked to PRRS vulnerability in adult pigs. When they exposed the pigs to the disease, they were immune, failing to experience symptoms associated with the disease, according to the new study in the Journal of Virology. It could take several years before genetic engineering is integrated into farms, but it would potentially save billions of dollars and pig lives.