Antigens aka "the little shady pieces"

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When it comes to biology or immunology i always say to myself i can not understand unless i watch your videos guys thanks alot

I wanted to tell you this was the most helpful video I have ever watched and I want to thank you immensely.

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By watching your videos I've been so much helped with my Immunology classes. Thankyou so much Sir♥️

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Awesome

Sal, how does the MHC1 know to bind to the unwanted protein and not any of the very much wanted organelles?

I think instead of preference it's "perforins" in the English captions

How does the B Lymphocyte "engulf" the pathogen? Is there some type of invagination like a phagocyte? Also, when it gets engulfed, does it just hang out in the cytoplasm or is there something like a phagozome to wait in before attaching to an MHC2? By the way, what does the "+" sign in CD4+ and CD8+ stand for?

nice video salman