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. 2022 Apr 27;13:843928. doi: 10.3389/fimmu.2022.843928

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Copyright © 2022 Zhang, Shen and Chang

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Antigen selection for COVID-19 vaccines. The role of varying antigens in immune response against COVID-19 ① Recombinant protein, ② Inactivated virus, ③ Live attenuated virus, ④ DNA, ⑤ Viral vector, and ⑥ mRNA.