A new study suggests someone might be able to get infected with one of the new variants of the coronavirus even if they've had Covid-19 before or have been vaccinated.
원문출처 : https://www.cnn.com/2021/01/19/health/coronavirus-variant-vaccine-protection/index.html
원문출처 : https://www.cnn.com/2021/01/19/health/coronavirus-variant-vaccine-protection/index.html