The novel coronavirus novel coronavirus pneumonia has been treated with mesenchymal stem cells since 2019. The safety and effectiveness of mesenchymal stem cells in the treatment of pneumonia in patients with new coronavirus infection in the new era, "the clinical study of the effectiveness of new stem cell therapy for severe pneumonia caused by mesenchymal stem cells" and other projects, is an urgent project for the treatment of new type of coronavirus pneumonia. At a recent press conference of the joint defense and control mechanism of the State Council held in China, the relevant head of the Ministry of science and technology said that more than 200 clinical trials of stem cell therapy have been completed in Wuhan, with good safety.