As i am shielding at the moment, should my wife also stay at home? she is a nurse and doing the covid vaccination clinics, but should she stop, to protect me?

Your health??: If you have risk factors that put you in high risk categories, then I would encourage your wife to quarantine with you. On the other hand, if you are generally in good health and no chronic health problems, your wife should continue to be the caregiver that she is called to be. This is her passion, to care for those in need. You shouldn't ask her to turn that off without good reason.