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前提是如果变种变得不太厉害的话。
有专家说,如果有基础病或者免疫系统疾病的人可能还需要booster。
www.ctvnews.ca
有专家说,如果有基础病或者免疫系统疾病的人可能还需要booster。
mRNA vaccines could offer long-term immunity to COVID-19: study
A new peer-reviewed study suggests that mRNA vaccines like the ones made by Pfizer-BioNTech and Moderna could offer years of protection against COVID-19.