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