A mix-and-match Covid-19 booster vaccine policy would provide two distinct advantages: a stronger immune response to the extra shot, plus a lot less confusion for people seeking booster doses.
원문출처 : https://www.cnn.com/2021/10/19/health/covid-vaccines-mix-analysis/index.html
원문출처 : https://www.cnn.com/2021/10/19/health/covid-vaccines-mix-analysis/index.html