The title of Gilead study is "A Phase 3 Randomized Study to Evaluate the Safety and Antiviral Activity of Remdesivir (GS-5734™) in Participants with Severe COVID-19". You can reach this study from this address,
The Remdesevir vs. HIV drug study can be read from #covid10 twitter address.
USA placebo-controlled trial can be reached from this website
The vaccine study is conducted in USA Kaiser Permanente Washington Health Research Institute.You can read the news from here .