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