As an agent to boost immunoresponsiveness among {HEAD ~ individuals} having {TAIL ~ an acquired loss} of B cell function 
As an agent to boost immunoresponsiveness among { HEAD ~ individuals } having { TAIL ~ an acquired loss } of B cell function
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH