How in the world did we end up with billions of doses of COVID-19 vaccines manufactured by Pfizer/ BioNTech, Moderna, AstraZeneca, and Johnson & Johnson?
— Chad P. Bown (@ChadBown) August 4, 2021
My latest, with @TomBollyky 1/ 🧵https://t.co/BOQRMaVEjX