Vaccines can be given before, during or after some cancer treatment. If you are due to start cancer treatment or have cancer surgery your specialist medical team may recommend that you have a vaccination before treatment begins. Having a vaccination before treatment gives a better chance of protection. 

Chemotherapy can weaken the immune system. If you are currently on chemotherapy treatment which will last for a few weeks, it may be recommended to delay your vaccination until after the treatment is completed. If the treatment will be longer, your oncologist may suggest taking the vaccine in between rounds of chemotherapy. 

Hormone therapy such as tamoxifen, letrozole, anastrazole etc does not necessarily weaken the immune system. As a result, you would be able to receive the vaccine at any time after consulting with your doctor.

You may be able to receive the vaccine at any time. It would be best to consult with your doctor first. 

If you are concerned that vaccination will increase your risk of lymphoedema, you can ask for the vaccine to be given on the arm where lymph nodes have not been removed. If both arms are affected, the vaccine can be given in your thigh.