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