Subjects will be randomized 2:2:1 to receive a single dose of COVI-DROPS 10 mg, COVI-DROPS 20 mg or matched placebo in a double-blind manner. Investigational product (COVI-DROPS or matched placebo) will be administered once as two separate 0.5 mL instillations (0.5 mL up each nostril). Subjects will be followed to Day 60.

Subjects will be randomized 1:1:1:1 to receive a single dose of COVI-DROPS 10 mg, COVI-DROPS 20 mg, COVI-DROPS 40 mg, or placebo in a double-blind manner. Investigational product (COVI-DROPS or placebo) will be administered once on Study Day 1. Subjects will be followed to Day 60.

This is a phase 2, randomized, double-blind, placebo-controlled study of the safety and efficacy of STI-5656 (Abivertinib Maleate) in subjects hospitalized due to COVID-19 in Brazil. Subjects are randomized 3:1 STI-5656 to placebo. Subjects receive either 100 mg of STI-5656 or placebo daily for 7 days. Standard of care will be maintained for all subjects throughout the study.

This is a Phase 2a randomized, placebo-controlled multicenter study designed to investigate the efficacy, safety and tolerability of COVI-MSC in treating post COVID-19 “long haul” pulmonary compromise.

COVI-MSC will be administered intravenously on Day 0, Day 2, and Day 4.

This is a Phase 2, open-label, randomized 2-arm multicenter study to assess the safety and efficacy of STI-5656 (Abivertinib Maleate) administered orally plus Standard of Care (SOC) versus SOC in hospitalized subjects with RT-PCR confirmed SARS-CoV-2 infection and COVID-19 pneumonia (documented radiographically). Only hospitalized patients are eligible for this study.

This study is single arm, non-randomized Phase 1 study of the safety and preliminary efficacy of PSC-04, an adipose-derived allogeneic mesenchymal stem cell. The outcome data will be compared to contemporaneous non-enrolled patients at the same clinical site(s) as the enrolled patients.

Study Objectives:

Primary: To evaluate the safety of intravenous infusion of allogeneic adipose stem cells in patients with COVID-19 disease and respiratory distress.

Secondary: To evaluate a set of secondary safety and efficacy outcome variables to give guidance in assessing the risk/benefit ratio in patients with COVID-19 respiratory distress.

This is a Phase 2 multicenter (United States and Mexico) study to assess the safety and preliminary efficacy of COVI-MSC in the setting of current standard of care in hospitalized subjects with RT-PCR confirmed SARS-CoV-2 (COVID-19) infection and acute respiratory stress (ARD) / acute respiratory distress syndrome (ARDS).

Subjects will be randomized 1:1 COVI-MSC to placebo. COVI-MSC or placebo will be administered intravenously on Day 0, Day 2, and Day 4.

This is a Phase 2 randomized controlled study to assess the safety and efficacy of COVI-MSC in the setting of current standard of care treatments for COVID-19 infection in hospitalized subjects with acute respiratory distress syndrome.

COVI-MSC or placebo will be administered intravenously on Day 0, Day 2, and Day 4.

Acceptable standard of care treatments for COVID-19 include all approved or emergency use authorized treatments for COVID-19, even if used off-label.