President Biden will announce the U.S. is buying 500 million more doses of the Pfizer-BioNTech COVID-19 vaccine. That would bring the total promised U.S. vaccine donations to more than 1.1 billion.
President Biden will announce the U.S. is buying 500 million more doses of the Pfizer-BioNTech COVID-19 vaccine. That would bring the total promised U.S. vaccine donations to more than 1.1 billion.