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Bob -- I immediately thought the same thing, since the tweets came so close together, but upon reflection, I think Lipkin must be alluding to something other than his cytokine research. He and his team have already talked about that research quite a bit publicly, including at this conference, while this "hot stuff" is something he says he can't give details on, which would rule out the cytokine research. Plus, I don't think he'd call it "hot stuff" if it's something everyone has heard already.
I'm guessing he's referring to a new finding related to RNA expression, metabolomics, proteomics, pathogens in white blood cells, or the "dumbed down" gut study they've been doing (not the giant one they're currently crowd-funding for). I believe those are all the major projects they've been working on.
Some sort of breakthrough RNA expression finding would not be a surprise, since they thought they had one in a previous study before they had to throw out the results for technical reasons that are beyond my comprehension.