In this Sept. 24, 2020, file photo, syringes of SARS CoV-2 Vaccine for COVID-19 produced by Sinovac are displayed during a media tour of its factory in Beijing. China is rapidly increasing the number of people receiving its experimental coronavirus vaccines, with a city offering one to the general public and a biotech company providing another free to students going abroad. (AP Photo/Ng Han Guan, File)
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