Yes, sure it will make easy for the body dealing with the period you use chemotherapy. Having antibacterial and antiinflammatory attributes I think is very helpul. But is not the only fighter with the ailments. There are also other things that you can use : bee products like propolis, bee power royal jelly, teas and the best you can do is to contact a doctor who has also knowledge about manuka. Its autority will give you more trust in manuka honey. Take care!