Among 34 Epstein-Barr virus isolates from nonimmunocompromised Chinese dono
rs, He identified three intertypic recombinants with type 1 sequences at th
e EBNA2 locus and type 2 sequences at some or all of the EBNA3A, -3B, and -
3C loci. These appear to have arisen from independent, evolutionary recent
recombination events; such events may be commoner in nonimmunocompromised p
opulations than hitherto imagined.