WEEKLY COVID VACCINE RESEARCH UPDATE Friday, July 23, 2021 High-income country confirmed dose total: 6.3 billion Upper-middle-income country total: 2.4 billion Lower-middle-income country total: 3.1 billion Low-income country total: 331 million COVAX total: 3.2 billion Total worldwide confirmed purchases of
Delta variant poses a global threat despite increased production of vaccines
