Mechanisms of inefficient vaccine protection against pathobionts such as S. aureus (SA) are still unclear. Here the authors show that prior SA exposure induces non-protective CD4+ T cells, which impair IsdB vaccine protection by IL-10 secretion and IL-17A suppression, whereas IL-17A promoting adjuvant CAF01 overcomes this dilemma.
- Irshad Ahmed Hajam
- Chih-Ming Tsai
- George Y. Liu