US To Donate Additional 500M Pfizer-BioNTech COVID-19 Vaccine Doses To Lower Income Nations<blockquote>美国将向低收入国家额外捐赠5亿剂辉瑞BioNTech COVID-19疫苗</blockquote>
Pfizer Inc and BioNTech SE will provide the U.S. government additional 500 million doses of its COVI