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. Author manuscript; available in PMC: 2015 Mar 20.
Published in final edited form as: Vaccine. 2010 May 26;28(0 2):B25–B31. doi: 10.1016/j.vaccine.2009.10.131

Fig 4. Increasing the diversity between immunogens and Env in challenge SHIV strains.

Fig 4

The degree of heterogeneity between the strain of Env in a potential vaccine and the challenge strain of virus is shown schematically as increasingly larger concentric circles.