Gene therapies are not a new concept. Scientists have been exploring gene therapy for decades as a way to treat genetic illness.
Take a look at this timeline of major milestones in gene therapies.

Check your understanding of gene replacement
When was the adeno-associated virus (AAV) first discovered?
The adeno-associated virus (AAV) was first discovered in 1965. This discovery is now being used in clinical trials and gene replacement therapies today.