Ian Haydon helped test Moderna's coronavirus vaccine last year. Now, he's helping test the tweaked version of that vaccine designed to fight a new, more contagious variant.
원문출처 : https://www.cnn.com/2021/04/04/health/covid-vaccine-protection-lasting-variants-wellness/index.html
원문출처 : https://www.cnn.com/2021/04/04/health/covid-vaccine-protection-lasting-variants-wellness/index.html