Africa has gone three years without a case of wild polio being detected, the World Health Organization said on Wednesday, a significant milestone in the quest to eradicate the disease.
원문출처 : https://www.cnn.com/2019/08/21/health/africa-countdown-polio-eradication/index.html
원문출처 : https://www.cnn.com/2019/08/21/health/africa-countdown-polio-eradication/index.html