A heterologous AZD1222 priming and BNT162b2 boosting regimen more efficiently elicits neutralizing antibodies, but not memory T cells, than the homologous BNT162b2 regimen.

"appendix a supplementary material the following are the supplementary data to this article: supplementary data 1 data availability data will be made available on request. data availability data will be made available on request. appendix a supplementary data to this article can be found online at https://doi"

"Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper."

"Funding statement This work was supported by the National Institute of Infectious Diseases, National Institute of Health, Korea Disease Control and Prevention Agency (#2021-ER1902–0 and #2021-ER2601-00), a grant from the Ministry of Health & Welfare, Republic of Korea (Grant No. HI14C1324), the 2020 Joint Research Project of Institutes of Science and Technology (J.Y.C) and the Institute for Basic Science (IBS), Republic of Korea, under project code IBS-R801-D2 (E.-C.S.)."