This study involves patients with community-acquired pneumonia or COVID-19 pneumonia who need to be in the hospital and require oxygen support. Community-acquired pneumonia is a lung infection that people get outside of hospitals or healthcare facilities, while COVID-19 pneumonia is a lung infection caused by the coronavirus. The treatment being tested is called trimodulin, also known by its code name BT588, which is a solution made from human blood that contains three types of antibodies called IgM, IgA, and IgG. These antibodies are proteins that help the immune system fight infections. Some patients will receive trimodulin while others will receive placebo, both given through a vein along with the standard care that all patients normally receive for their lung infection.
The purpose of this study is to find out if trimodulin is effective and safe when added to standard care for treating hospitalized adult patients with community-acquired pneumonia or COVID-19 pneumonia. The study will look at whether patients who receive trimodulin do better than those who receive placebo by measuring how many patients get worse or die during the study period. Patients in the study will receive the treatment through an infusion into a vein over five days.
During the study, doctors will monitor patients for up to 91 days to see how they respond to treatment. They will check if patients need more intensive breathing support or if their condition improves, stays the same, or gets worse. The study will also measure various blood markers related to inflammation, immune system function, and blood clotting to understand how the treatment works in the body. Safety will be carefully watched by recording any unwanted effects that occur during and after the treatment period.



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