New research led by King's College London (KCL) has discovered thousands of DNA sequences originating from ancient viral infections expressed in the brain.
An unusual version of retrovirus that lies between genes involved in chemical reactions in the brain is found more often in addicts than the rest of the population.
Scientists have discovered the history of Retrovirus - the virus that existed 30 million years ago, helping scientists better understand the evolution of today's viruses.
A new treatment recently announced by Rockefeller University a few days ago showed that it was basically possible