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Covid-19, preventing virus, healthcare workers and vaccination concept. Smiling doctor in medical mask and gloves pouring chemical ingridient into another test-tube, conducting vaccine tests.
Covid-19, preventing virus, healthcare workers and vaccination concept. Smiling doctor in medical mask and gloves pouring chemical ingridient into another test-tube, conducting vaccine tests.
Covid-19, preventing virus, healthcare workers and vaccination concept. Satisfied smiling doctor in medical mask and gloves pointing at test-tube with vaccine sample, pleased with good result.
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