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