https://www.selleckchem.com/pr....oducts/2-3-butanedio
Online open-book examination has the potential to be the new normal in the present circumstances and beyond. Since December 2019, a new coronavirus viral was initially detected in Wuhan, China. Population migration increases the risk of epidemic transmission. Here, the objective of study is to estimate the output risk quantitatively and evaluate the effectiveness of travel restrictions of Wuhan city. We proposed a modified susceptible-exposed-infectious-recovered (SEIR) dynamics model to predict the number of coronavi