to determine whether adrv was a new virus introduced in 1982 or had been present before that time , we examined antibody titers of adrv in gamma globulin ( pooled immunoglobulin ) pools that were prepared during 1977 to 1987 in four cities in the people 's republic of china ( shanghai , lanzhou , wuhan , and chandu ) .
C0017007
gamma globulin
C0021027
immunoglobulin