Health experts fear an outbreak of the polio virus in the Americas during the Covid-19 pandemic due to a delay in vaccinations and surveillance.
원문출처 : https://www.cnn.com/2020/10/23/health/polio-outbreak-risk-covid-19/index.html
원문출처 : https://www.cnn.com/2020/10/23/health/polio-outbreak-risk-covid-19/index.html