A lot of it was real time, more so than i've ever done in my life. I thought the drama and the poignance of the book comes from the fact that even though we know how it turns out, it was certainly not a foregone conclusion,. That was my gall writing this thing to a present that history. It's my way, its conceit, to describe the immune system, describe the evolution of some of these axim approaches. But i also am trying to antecedently in the reader, tr the listener, if you listen to the audio, i want to make it clear how challenging it is to develop vaccines  and how many efforts failed along the