Dr. Ding doesn't work on infectious disease. (1 paper on HIV/HepC). At best, he works on all-cause mortality. Most of his personal work covers drug policy and nutrition. Important work, but not relevant. He's inserting himself into #nCoV2019 on purpose. scholar.google.com/citations?user…
He's also drawing people into conspiracies about the origins of #ncov2019. You'll note he says "no conspiracies please," but then defaults to language and rhetoric familiar to anyone who studies conspiracy spreaders: the "just asking questions" and "not the whole story." 
This is classic propaganda. He leverages his alleged expertise & creates a veneer that he's just asking questions, in order to feed the more radical views of his followers. He sows doubt in the guise of science, but to feed a certainty that folks have that they are being misled.
This guy is bad news. Avoid spreading his analysis. There are so many other folks whose work is exactly outbreaks like this: @aetiology, @maiamajumder, @SaskiaPopescu, @rocza, @alexandraphelan to name just a few. Go to the experts on *this* topic. #nCoV2019
(No links, just images, because I want folks to see but don't want the algorithm to assign benefit to him, which I take it is absolutely what he wants.)
