What is happening, Doctor, is that I'm injecting the patient with weakened or inactive antigens, this triggers an immune response within the body. His white blood cells then make the correctly shaped antibodies.
Ha, ha, ha!!
AAAAAAAAAAH!!!! 0OOOOOOOOOW!!!!
HOSPITAL
AAAAAAAAAAAAAAAAAAH!!!! The Ambulance reversed into me and then this Walrus attacked me!!!!