Right around when we started working to cure HIV.

Lishomwa Ndhlovu, M.D., Ph.D.
“The results of this pre-clinical study, targeting the HIV co-receptor CCR5, have the potential to be groundbreaking as we essentially have a tool that can mimic the genetic mutations of CCR5 that render some individuals immune to infection and have led in part to two cases of a cure of HIV,” said the other co-corresponding author, Lishomwa Ndhlovu, M.D., Ph.D., a professor of immunology in medicine at Weill Cornell Medicine in New York.“

https://news.ohsu.edu/2021/06/07/monoclonal-a...tudy-finds