Figure S5.

In vitro proliferation studies, related to Figure 4

(A) Secreted antibodies in Figure S4B for the prior-infected group against B.1 D614G spike shown color-coordinated by time of infection relative to booster vaccination. PBMCs of the six individuals with interval < 180 days were stimulated to evaluate cell division by CFSE dilution.

(B) Gating of live CD19⁺ cells after four days in culture.