b Naive WT C57BL/6 mice ( em n /em ?=?5) were subcutaneously immunized, boosted and bled at the indicated time points
b Naive WT C57BL/6 mice ( em n /em ?=?5) were subcutaneously immunized, boosted and bled at the indicated time points. The poor antibody persistence after natural SARS-CoV-2 contamination raised issues about whether a vaccine could induce a long-lasting antibody response and whether a memory recall response would be induced upon reinfection.1,2 Currently, over 200…