Poxvirus Genetic Recombination during Natural Virus Transmission Gershon, Paul D. and Paul Kitching, R. and Hammond, Jef M. and Black, Donald N.,, 70, 485-489 (1989), doi = https://doi.org/10.1099/0022-1317-70-2-485, publicationName = Microbiology Society, issn = 0022-1317, abstract= SUMMARY We have compared detailed physical maps of the genomes of four capripoxvirus isolates, representing four capripoxvirus genome types. The comparisons strongly suggest that the progenitor of one of these isolates arose by genetic recombination between members of two of the other three types., language=, type=