On the 15th local time, WHO held a regular press conference on new coronary pneumonia. WHO Director-General Tan Desai said that he had received reports from Europe and North America in the past few weeks, showing that a small number of children have multi-system inflammatory syndrome in children. Being sent to the intensive care unit, some features are similar to Kawasaki disease and toxic shock syndrome. The initial report assumed that it may be related to new coronary pneumonia, and WHO has developed a preliminary case definition and report form. Tan Desai called on doctors all over the world to cooperate with relevant agencies and WHO in various countries to stay vigilant and better understand this syndrome in children. (Reporter Zhu He)