 Aside from the fact that this is like so unbelievably incredibly cool and handy, like thank you for this incredible protection, the memory B aspect, the memory aspect of this response enables something that is truly game changing in our society, especially if people would actually take advantage of it. And that is vaccines. Vaccinations stimulate the more humoral response without actually giving you a disease. So how do they do that? They will give you a vaccine contains some parts of the bad guys, the antigens. Basically, you take and smush up the bad guys and get out their specific antigens and then dump those into your blood. And then your naive B cell that matches with that antigen says, oh, look, it's my bad guy. And it goes through this whole process. What's the difference? It wasn't the whole bad guy. It was just bad guy pieces, so you don't get sick. That's the idea. And yet, this is a battle, but the most important thing is that your body produces the memory cells. And then if some people don't get vaccinated so that the disease, the bad guy is still out there, then if you get exposed to that bad guy, your memory B cells fly into action instantaneously and you never get the disease, you totally are re-exposed. This is another reason why some diseases you don't get twice. Some diseases many people often don't get twice. And then one in my brain is chickenpox. You don't suffer, but most of the time you don't get it twice. You get it the first time, you suffer, you itch, you deal with it, sad story, but then your body has created memory cells and then you don't have to get it ever again. Things like flu or the common cold, those bad guys mutate so quickly, their antigens change so quickly that we can't get, well, we try, especially with flu, we try, but it's much harder to get a good solid vaccine that will treat you every time because sure, you don't get the same one twice, you don't get the same cold twice, you get a different version because the virus mutated, bummer. Could you explain why vaccines work from the emission of the humoral immune response? Probably would be a good idea. Okay, B cells are just half the acquired immune response story. Let's talk about what T cells do.