Ingenious: The HIV Gene

Some people are naturally immune to HIV, and their genes can be used to remove the virus from a patient's system altogether. But given that HIV is a new disease, how did this resistance evolve? And what does this mean for the millions living with the condition? Kat Arney digs into the buried past of the `HIV gene", and its life-saving future, with Dr Stephen O'Brien and Dr Ravi Gupta