00:01
Okay, so chapter 33, problem 22, we're looking at a skin test, right? and 4 tb, and what exactly is a skin test? well, what happens is the doctor will take usually in your forearm.
00:19
Let's let that be someone's forearm.
00:22
They'll actually inject.
00:24
So let this be a needle.
00:27
There we go.
00:29
A little bit into their forearm, right? so they are injecting some tuberculin and seeing what happens, what's the result? and one of two things will happen, right? either there won't really be much of a result.
00:47
Of course, you wear stabbed with a needle, so maybe a tiny response, or you might have a very, very active response, right? so if you have no response, that's going to be negative.
00:58
You're having a negative outcome.
01:02
And if you have a lot of inflammation, then this is your positive outcome...