http://www.sciencemag.org/news/2021/03/countries-now-scrambling-covid-19-vaccines-may-soon-have-surpluses-donate

Dozens of wealthy nations should by the end of the year have many surplus doses of COVID-19 vaccines like these made by BioNTech and Pfizer.

Science’s COVID-19 reporting is supported by the Heising-Simons Foundation.