What is the functioning of immune system? Discuss.

The immune system is a complex network of cells, tissues, and molecules that work together to protect the body from infections and diseases, including HIV/AIDS. It consists of two main branches: _________ ________ _____ ____ _______.
________ _________ __________ ______ _______ _________ _____ ___.
_______ _______ ____ _____ ______ __________ _________ _________ ____ _________ ___ _________.
_________ ________ _________ _________ _______ ___ _______ __________.
_________ _____ __________ _________ _______ ______ ___ ____ ___.
_______ __________ __________ __________ ________ _______ ______.
______ _____ ____ _________ ____ _______ _________ ______ ____ ____.
__________ _________ _______ __________ ________ __________ ______.
__________ __________ ___ _______ ______ ______ _______ _____.
______ _______ _________ _________ _____ ________ _________ ______ ___ ___.
____ _________ ______ _______ ___ _____ ___ ________ _________ _____ __________ ______.
________ _______ __________ __________ _________.
____ ______ ______ ______ _________ ____ ___ ______ ___ ______.
__________ _________ ________ _______ ______ ____ ______.
_______ ______ ______ ___ _____ ___ _________.
___ ___ ________ _____ ____ ________ ______ __________ _______ _____.
__________ ___ _________ _____ _________.
________ ________ ___ _______ __________ _____ _______ ______ ____ ______.
________ _____ _________ _________ ______ _____ ________.
______ _______.
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