Bavencio 200 mg Infusion is an anti-cancer medicine used in the treatment of different types of cancer. It contains Avelumab, a type of immunotherapy called a checkpoint inhibitor. It blocks proteins that stop the immune system from attacking the cancer cells; this allows the immune cells to kill the cancer cells. Bavencio 200 mg Infusion may cause side effects such as diarrhoea, nausea, vomiting, tiredness, itching, rash, headache, fever, shortness of breath, muscle/joint pain, loss of appetite and injection site reactions.