The 5:30 A.M. Warrior Call: The FDA Approves Phase 2 Testing of Coronavirus Vaccine (5/8/2020) Posted byJoe De Sena May 8, 2020 Leave a comment on The 5:30 A.M. Warrior Call: The FDA Approves Phase 2 Testing of Coronavirus Vaccine (5/8/2020) Biotech company Moderna said it plans to start phase 2 trials with 600 participants shortly.