It further describes recombinant viruses derived from this virus and the use of {TAIL ~ the virus}, or {HEAD ~ its recombinants}, as a medicament or vaccine 
It further describes recombinant viruses derived from this virus and the use of { TAIL ~ the virus } , or { HEAD ~ its recombinants } , as a medicament or vaccine
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH