Immune Modulators for Treating COVID-19

ACTIV-1 IM is a master protocol designed to evaluate immune modulators for the treatment of moderately or severely ill hospitalized patients infected with COVID-19. Trial participants will be assessed daily while hospitalized. If the participants are discharged from the hospital prior to Day 29, they will have follow-up study visits at Days 8, 11, 15, 22, and 29. For discharged participants, it is preferred that the Day 8, 11, 15, and 29 visits are in person to obtain safety laboratory tests and blood (serum/plasma) samples for secondary research as well as clinical outcome data. However, infection control or other restrictions may limit the ability of the participant to return to the clinic. In this case, these visits may be conducted by phone, and only clinical data will be obtained. The Day 22 visit does not have laboratory tests or collection of samples and is conducted by phone. The Day 60 assessment will be conducted by phone. The effectiveness of each therapeutic agent as add-on therapy to SoC plus remdesivir (provided) will be evaluated based on the primary endpoint of time to recovery by Day 29. The sample size requirements are based on the ability to detect a moderate improvement in time to recovery (3-4 fewer days) for each agent. A total of 788 recoveries are required for each comparison to provide approximately 85% power to detect a recovery rate ratio of 1.25. Assuming 73% of participants achieve recovery in 28 days, consistent with the ACTT-1 results, the total sample size to evaluate 1, 2, and 3 agents in ACTIV-1 IM is approximately 1080, 1620, and 2160, respectively. Because each agent is being compared to SoC with no between-agent comparisons, no multiplicity adjustments for multiple agents are planned. The CVC arm of the study was closed to enrollment on 3-Sep-2021.