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