China's leading respiratory expert, Zhong Nanshan, and his group, have issued a preprint article on the coronavirus infection on the website “medRxiv.org”. And we want to stress that the article still needs to be peer-reviewed and it's not established information yet. But it in concludes that the incubation could be as long as 24 days. That's 10 days longer than previously thought. And the conclusion is based on the larger samples 1099 patients so far. And that paper also cautions against the judging infection on fever symptoms. Data shows that only 44% of confirmed patients have showed early signs of fever. And the article also says the accuracy of CT testing is just over 75%. Aside from CT testing the current, major testing method is nucleic acid detection.