Three vaccines have been in the news recently (four if we count Sputnik). But there are 21 vaccines in phase 1 trials, 13 in phase 2, and 10 in phase 3 https://t.co/BY8bIoK7pW

— Peter Ungphakorn (also on Bluesky and Mastodon) (@CoppetainPU) December 4, 2020