Next, cells are inoculated with {TAIL ~ neurotropic virus} under {HEAD ~ conditions} that restrict viral propagation 
Next , cells are inoculated with { TAIL ~ neurotropic virus } under { HEAD ~ conditions } that restrict viral propagation
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH