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Continue to ChatHigh GUD incidence in the early 20 century created a particularly permissive time window for the origin and initial spread of epidemic HIV strains https://ghtm.ihmt.unl.pt/publications/high-gud-incidence-in-the-early-20-century-created-particularly-permissive-time-window-for-the-origin-and-initial-spread-of-epidemic-hiv-strains/