As so many people around the globe contemplate what their lives might look like after the pandemic, new research on smallpox might help provide insight.
원문출처 : https://www.cnn.com/2020/12/22/health/smallpox-death-rates-covid-wellness/index.html
원문출처 : https://www.cnn.com/2020/12/22/health/smallpox-death-rates-covid-wellness/index.html