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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.
Covid-19, healthcare workers, pandemic and virus concept. Close-up of serious hispanic doctor in white scrubs and medical mask, gloves pointing finger at hand sanitizer, ask patients use it.
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, healthcare workers, pandemic and preventing virus concept. Close-up of serious-looking doctor in white scrubs, stethoscope, medical mask, physician looking concerned, listen to patient.
