These vaccines are produced with portions of {TAIL ~ C.} difficile Toxin A, or {HEAD ~ Toxin B}, or both 
These vaccines are produced with portions of { TAIL ~ C. } difficile Toxin A , or { HEAD ~ Toxin B } , or both
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH