Charles told her: "Don't worry it doesn't take too long." Camilla added: "It's a good thing. It doesn't hurt. I was waiting for it to be done and they said 'It has been done'. It was painless. It was brilliant.
"'It's very good when it's over as you feel more secure. Panic over."
She later told more trial staff: "I leapt for joy. I didn't feel anything. I'm eternally grateful for everything."
Nicki, a property developer and mother of three from Bromsgrove, Worcs, has been shielding since November when she was diagnosed with breast cancer. She is part of a trial to test the vaccine on chemotherapy patients.