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A medical worker prepares to administer a Moderna COVID-19 vaccine in earthquake-affected Petrinja, Croatia, Jan. 13, 2021. (Zeljko Lukunic/Pixsell via Xinhua)
A medical worker prepares to administer a Moderna COVID-19 vaccine in earthquake-affected Petrinja, Croatia, Jan. 13, 2021. (Zeljko Lukunic/Pixsell via Xinhua)