A method to determine the ability of {HEAD ~ a non neurotropic virus} to become quiescent and reactivatable in {TAIL ~ a PC12 cell line}, comprising: 
to become reactivatable in
A method to determine the ability of { HEAD ~ a non neurotropic virus } to become quiescent and reactivatable in { TAIL ~ a PC12 cell line } , comprising :
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH