From: Dengue type 4 in Rio de Janeiro, Brazil: case characterization following its introduction in an endemic region
Type of infection (%)/Year
2011 (nĀ =Ā 11)
2012 (nĀ =Ā 397)
2013 (nĀ =Ā 100)
Total (%) (nĀ =Ā 508)
Primary
3 (27.3)
198 (49.9)
58 (58.0)
259 (51.0)
Secondary
8 (72.7)
199 (50.1)
42 (42.0)
249 (49.0)