Check out the Thought Emporium [0] on YouTube, they've got a number of biology experiments that you might find interesting. My personal favorite is the one where they make a meat berry.
[0] https://www.youtube.com/channel/UCV5vCi3jPJdURZwAOO_FNfQ
[0] https://www.youtube.com/channel/UCV5vCi3jPJdURZwAOO_FNfQ
I'd suggest watching the 2nd (retrospective) video first, and then the first video if you're interested in more detail.
Was this ever reported anywhere? This is crazy news.
My mind also remains blown.
Summary: Guy is lactose intolerant. He inserts a sequence providing lactose tolerance into an adeno-associated virus. He then infects himself with this virus, which inserts the target sequence into his own genome.
He is then able to gorge himself on pizza without digestive problems, and he's still able to do so several months later.
The adeno-associated virus is like a retrovirus, except that, per [0], the AAV will insert at a particular location in the genome, instead of at random locations.