Henderson led WHO's effort to rid the world of smallpox | |
Over the next four weeks, to make sure smallpox didn't take hold in the USA, health workers vaccinated 6 million New Yorkers, all to contain a 12-person ... |
Source : google.com
Henderson led WHO's effort to rid the world of smallpox | |
Over the next four weeks, to make sure smallpox didn't take hold in the USA, health workers vaccinated 6 million New Yorkers, all to contain a 12-person ... |
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