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In this file photo, a healthcare worker takes a nasal swab sample to test for COVID-19, in Buenos Aires, Argentina, Friday, Jan. 8, 2021. (AP Photo/Natacha Pisarenko)  **FILE**
Photo by: Natacha Pisarenko
In this file photo, a healthcare worker takes a nasal swab sample to test for COVID-19, in Buenos Aires, Argentina, Friday, Jan. 8, 2021. (AP Photo/Natacha Pisarenko) **FILE**

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