For more info about what this commenter is talking about: - https://en.wikipedia.org/wiki/Antigen-presenting_cell https://en.wikipedia.org/wiki/Antigen-present

For more info about what this commenter is talking about: - https://en.wikipedia.org/wiki/Antigen-presenting_cell https://en.wikipedia.org/wiki/Antigen-presenting_cell - https://en.wikipedia.org/wiki/Major_histocompatibility_complex https://en.wikipedia.org/wiki/Major_histocompatibility_compl...