As more people get vaccinated and the spread of Covid-19 becomes more controlled, public health officials are issuing new travel advice for more than 120 countries.
원문출처 : https://www.cnn.com/2021/06/08/health/cdc-international-travel-advice-covid/index.html
원문출처 : https://www.cnn.com/2021/06/08/health/cdc-international-travel-advice-covid/index.html