The method 1, wherein {HEAD ~ the titer} of virus produced by {TAIL ~ the infected cells} is at least 108 TCID50/ml 
produced by
The method 1 , wherein { HEAD ~ the titer } of virus produced by { TAIL ~ the infected cells } is at least 108 TCID50 / ml
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH