00:01
All right, so we are in chapter 33, number 20, and we're looking at severe combined amino deficiency, right? so that's often abbreviated as scid, and this is a very rare genetic disease.
00:13
About one in half a million people have it, and so that's good, that it's rare.
00:20
And what defines this disease and what traits you would need to have to have it, is that both, both, t and b cells are either lacking completely, so they're missing, or non -functional, right? so one way or another, they're not doing anything for the body.
00:53
And so we can see immediately in our problem here that that means both b and d are correct.
01:00
But more than that, it sort of is asking us, like, what do these cells do, right? so remember the t cells, t cells play a role in the cell mediated immunity...