![A family of three and a worker who goes door to door to screen for COVID-19 in Pretoria, South Africa.](/sites/default/files/styles/thumbnail/public/coronavirus-global-response-helped-raise-billions-research-we-need-more-070520-1500x844.jpg?itok=A8BC0RfD)
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A healthcare worker who goes door to door to screen for COVID-19 in Pretoria, South Africa.
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![A family of three and a worker who goes door to door to screen for COVID-19 in Pretoria, South Africa.](/sites/default/files/coronavirus-global-response-helped-raise-billions-research-we-need-more-070520-1500x844.jpg)
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