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Two businesswoman in medical protective masks are talking in office.
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Two businesswoman in medical protective masks are ...

St. Petersburg, Russia - March 22, 2020: UEFA Euro 2020 postponed to 2021 due to coronavirus pandemic.
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St. Petersburg, Russia - March 22, 2020: UEFA Euro...

The Alabama National Guard prepares to fly polio vaccine from Birmingham to Haleyvilled during the epidemic of 1963, 1963. In the early 1950's, there were more than 20, 000 cases of polio each year. A...
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The Alabama National Guard prepares to fly polio v...

World with syringe injection and covid virus cells isolated on white 3D rendering illustration. Global vaccination or vaccine against coronavirus dise
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World with syringe injection and covid virus cells...

Two workers stand beside a cart loaded with boxes containing poliovirus vaccine, 1963. In the early 1950's, there were more than 20, 000 cases of polio each year. After polio vaccination began in 1955...
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Two workers stand beside a cart loaded with boxes ...

People in Columbus, Georgia awaiting polio vaccination during the earlier days of the National Polio Immunization Program, 1973. In the early 1950's, there were more than 20, 000 cases of polio each y...
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People in Columbus, Georgia awaiting polio vaccina...

Protection against smallpox by inoculation with the cowpox virus. Edward Jenner (1749-1823), British physician and naturalist, developed a vaccine for the often fatal viral infection of smallpox. He i...
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Protection against smallpox by inoculation with th...

kid with medical mask and backpack going to school outdoor
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kid with medical mask and backpack going to school...

covid-19,kid with medical mask and backpack who walks to school outdoor
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covid-19,kid with medical mask and backpack who wa...

Digital illustration of a washing hands sign over Coronavirus Covid=19 cells spreading
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Digital illustration of a washing hands sign over ...

portrait of a kid with medical mask and backpack waiting at the school door outdoor
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portrait of a kid with medical mask and backpack w...

Digital illustration of a washing hands sign over Coronavirus Covid=19 cells spreading in background
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Digital illustration of a washing hands sign over ...