{HEAD ~ Many different compositions} for {TAIL ~ the slow release} of vaccines have been described which would be applicable to the method of the invention, for example, as described in Sanders, H. J., Chem. & Engineering News, Apr. 1, 1985, pp. 30 48 
for
{ HEAD ~ Many different compositions } for { TAIL ~ the slow release } of vaccines have been described which would be applicable to the method of the invention , for example , as described in Sanders , H. J. , Chem . & Engineering News , Apr. 1 , 1985 , pp . 30 48
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH