Clinical Research Directory

Evaluation of the Safety and Efficacy of Autologous COVID-19 Antigen Specific T Cell in Prolonged SARS-CoV-2 Patients

The goal of this clinical study is to evaluate the safety and efficacy of autologous COVID-19 antigen specific T cell (LB-DTK-COV19) treatment in prolonged SARS-CoV-2 infected patients. The main questions it aims to answer are: * What adverse events occur after the infusion of LB-DTK-COV19? * Is there a clinically significant improvement in clinical symptoms within 4 weeks after the infusion? * Is there a clinically significant reduction in SARS-CoV-2 viral load within 4 weeks after the infusion? The patients will: * Receive a single infusion of LB-DTK-COV19 either intravenously or using central venous catheter during the baseline visit at a dose of 1x10\^7/m\^2. * Receive a second infusion of LB-DTK-COV19 either intravenously or using central venous catheter at the same dose 14 days after the first infusion. * Attend follow-up visits at the clinic for 6 months after the first infusion.