Fig. 5From: The burden of laboratory-confirmed pertussis in low- and middle-income countries since the inception of the Expanded Programme on Immunisation (EPI) in 1974: a systematic review and meta-analysisMeta-analysis of the relative risk of pertussis comparing HIV-unexposed uninfected (HUU) to HIV-exposed uninfected (HEU) (a) and HIV infected (b)Back to article page