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. 2022 Mar 30;14(638):eabm4996. doi: 10.1126/scitranslmed.abm4996

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Fig. 1. — Twenty rhesus macaques were immunized with 1 × 10¹¹ vp (n = 10) or 5 × 10¹⁰ vp (n = 10) Ad26.COV2.S. The study start was staggered, and half of the animals in each dose group were followed for 230 or 315 days. Blood was collected longitudinally from days 0 to day 230 or 315 after immunization to evaluate the durability of single-dose Ad26.COV2.S. On day 230 or 315, all the macaques received a boost immunization with 5 × 10¹⁰ vp Ad26.COV2.S (n = 10) or Ad26.COV2.S.351 (n = 10). vp, viral particles; D, day.