How does the Johnson & Johnson vaccine work?

Dr Claire Cole, head of research delivery at MFT, receives a dose of the vaccine developed by Janssen after she became the first volunteer for the phase three trial (Manchester University NHS Foundation Trust/PA)
Dr Claire Cole, head of research delivery at MFT, receives a dose of the vaccine developed by Janssen after she became the first volunteer for the phase three trial (Manchester University NHS Foundation Trust/PA)