395trek

that's why in clinical trials you first do phase 1 human subjects where they are healthy and take small sub-therapeutic doses to test safety/tolerability. once it's established safe in humans they do phase 2 where they test if it works on sick people. Yeah I know this is different with transduction but they could at least test the vector first, maybe they did? Maybe some kind of lentivirus vector

kinda sounds like in vivo test driven dev