adaptive-immunity

The immune system is not a single organ or a single type of cell — it is a distributed surveillance network that distinguishes your own tissue from foreign invaders within minutes, then builds custom molecular weapons if the first response is not enough. Here is how.

Explore how the immune system defends your body — from skin barriers to T cells, vaccines, autoimmunity, and cancer immunotherapy.

Inside the T-cell receptor: the alpha/beta protein pincer that scans MHC-bound peptides, the thymic gauntlet that filters out self-reactive clones, and why this molecular handshake underlies CAR-T therapy.