Immunotherapy is a type of cancer treatment that helps your own immune system fight cancer. Some side effects are common with all types of immunotherapy.

At the site of the injection you might feel/see pain, swelling, soreness, redness, itchiness or a rash;

You may have flu-like symptoms, including fever, chills, weakness, dizziness, nausea or vomiting, muscle or joint aches, fatigue, headache, trouble breathing, low or high blood pressure (cancer.gov)