These vaccines are useful for administration to humans and other animals at {HEAD ~ risk} of exposure to {TAIL ~ C.} difficile toxins 
These vaccines are useful for administration to humans and other animals at { HEAD ~ risk } of exposure to { TAIL ~ C. } difficile toxins
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH