... central strain of that family than t o any otherfamily, including “ pure” subtypes, l ike the examplesshowninFigs.1,2,3.Eachfamilywouldbedefinedby a central se quetype and the radius of family ... recombinant lineages, which are highly prevalent in the current HIV epidemic, are a mixture of ancient and recent recombination. The HIV pandemic is moving towards havingincreasing complexity and ... co-circulating in the early 1990s [30-33], or in Myanmar and then importedfrom there into China [34-37]. It has not been estab-lished whether other BC recombinants in Myanmar and China are epidemiologically...