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