In December 2019, viral pneumonia caused by a novel beta-coronavirus (Covid-19) broke outin Wuhan, China. Some patients rapidly progressed and suffered severe acute respiratoryfailure and died, making it imperative to develop a safe and effective vaccine to treatand prevent severe Covid-19 pneumonia. Based on detailed analysis of the viral genome andsearch for potential immunogenic targets, a synthetic minigene has been engineered basedon conserved domains of the viral structural proteins and a polyprotein protease. Theinfection of Covid-19 is mediated through binding of the Spike protein to the ACEIIreceptor, and the viral replication depends on molecular mechanisms of all of these viralproteins. This trial proposes to develop and test innovative Covid-19 minigenesengineered based on multiple viral genes, using an efficient lentiviral vector system(NHP/TYF) to express viral proteins and immune modulatory genes to modify dendritic cells(DCs) and to activate T cells. In this study, the safety and efficacy of this LV vaccine(LV-SMENP) will be investigated.

Thousands of healthcare workers have been infected with SARS-CoV-2 and contractedCOVID-19 despite their best efforts to prevent contamination. No proven vaccine isavailable to protect healthcare workers against SARS-CoV-2.This study will enroll 470 healthcare professionals dedicated to care for patients withproven SARS-CoV-2 infection. Subjects will be randomized either in the observational(control) group or in the inhaled nitric oxide group. All personnel will observe measureson strict precaution in accordance with WHO and the CDC regulations.

In December 2019, viral pneumonia (Covid-19) caused by a novel beta-coronavirus(SARS-CoV-2) broke out in Wuhan, China. Some patients rapidly progressed and sufferedsevere acute respiratory failure and died, making it imperative to develop a safe andeffective vaccine to treat and prevent severe Covid-19 pneumonia. Based on detailedanalysis of the viral genome and search for potential immunogenic targets, a syntheticminigene has been engineered based on conserved domains of the viral structural proteinsand a polyprotein protease. The infection of Covid-19 is mediated through binding of theSpike protein to the ACEII receptor, and the viral replication depends on molecularmechanisms of all of these viral proteins. This trial proposes to develop universalvaccine and test innovative Covid-19 minigenes engineered based on multiple viral genes,using an efficient lentiviral vector system (NHP/TYF) to express viral proteins andimmune modulatory genes to modify artificial antigen presenting cells (aAPC) and toactivate T cells. In this study, the safety and immune reactivity of this aAPC vaccinewill be investigated.

The novel coronavirus (SARS-CoV-2) is a new strain of coronavirus found in human in 2019,which causes epidemic worldwide. Novel coronavirus disease (COVID-19) causes acute lunginjury (ALI) and acute respiratory distress syndrome (ARDS) in patients with severeCOVID-19. Pulmonary edema is the key detrimental feature of ALI/ARDS. Autopsy of patientsdied from COVID-19 reported that, pulmonary mucus exudation was more severe and obviousthan SARS infection. Pulmonary CT scanning and pathological findings also suggest thatpulmonary edema caused by inflammatory exudation is a distinguished feature of COVID-19.Vascular endothelial growth factor (VEGF), also known as vascular permeability factor(VPF), is known as the most potent factor to increase vascular permeability, with theinduction effect 50,000 times stronger than histamine. Bevacizumab is an anti-VEGFrecombinant humanized monoclonal antibody, which has been used in anti-tumor treatmentsince 2004, with considerable reliability and clinical safety. This trial will providehigh level evidence to answer whether bevacizumab is efficacy and safe medication forpatients with severe COVID-19.