Bovine spongiform encephalopathy (BSE), commonly known as mad-cow disease, is a fatal, neurodegenerative disease in cattle, that causes a spongy degeneration in the brain and spinal cord. BSE has a long incubation period, about 4 years, usually affecting adult cattle at a peak age onset of four to five years, all breeds being equally susceptible. In the United Kingdom, the country worst affected, more than 179,000 cattle have been infected and 4.4 million slaughtered during the eradication program.
It is the cross breeding of the genes of living creature and the vegetation/crop which will make vegetarian food into non-vegetarian. For example genes of rats are added to wheat so that rat will not eat it. Will it be safe? This question can not be answered by tests of few years. In the matters of genes effect will show after several generations. What about the freedom of choice? Nobody talks about that in free market. Watch this video: