Specific (Adaptive) Immunity | Humoral and Cell-Mediated Responses

CORRECTION: What I labeled "CD4+" in the diagram is actually the "TCR," which stands for "T-Cell Receptor." The CD4 glycoprotein is a coreceptor with the TCR, but it's not shown in my diagram.

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This is how our bodies learn to identify a new pathogen and develop immunity to that pathogen in the future.

0:00 Introduction
0:48 A Wild Pathogen Appears!
2:11 Phagocytosis and Presenting the Antigen
3:27 T-Helper Cells
4:29 Humoral Response (B-Cells and Antibodies!)
7:07 Cell-Mediated Response (Killer T-Cells!)
9:18 Recap
11:13 More bad acting...

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Image used:

[halqthedarktemplar]

To add a bit to the cell-mediated response for people reading the comments, the infected cell presents the antigen via the MHC-I (instead of the MHC-II of the APC cells) and the T-killer lymphocyte uses the CD8 receptor for that antigen

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