> To what degree is it a gray box though? Or is it white box? Its fairly gray. Immunology is something we've been studying for over a century at this point, an

> To what degree is it a gray box though? Or is it white box? Its fairly gray. Immunology is something we've been studying for over a century at this point, and the amount we understand it truly amazing. But at the same time, our bodies are such complex systems, that there is still so much we don't understand. It's certainly not a black box, but I definitely wouldn't call it a white box either.