This is an HMS academic article from Harvard Medical School. Nsoesie and his friends analyzed the number of vehicles in the hospital parking lot and the trend of Internet search, and concluded that the epidemic began in Wuhan as early as August 19. Of course, Harvard Medical School itself

For the small partners who do business marketing on the new media platform, I think there are three points that must be taken as long-term optimization ideas, namely, platform algorithm, content tonality, and operation strategy. The platform algorithm determines the logic of our account traffic distribution, the content tonality determines the exposure of the account/single note, and the operation strategy is the operation behavior we take to achieve a certain purpose by doing content on the platform.