Risk of intestinal infection and diarrhoeal disease in the whole cohort, and according to HIV status and CD4 count. Fig 2A shows the absolute risk of intestinal infection per month, irrespective of symptoms, for pathogens using the restrictive definition (see Methods), and Fig 2B shows the absolute risk of infection per month, irrespective of symptoms, using the more open definition. Fig 2C shows the percentage of intestinal infections associated with diarrhoea (i.e. disease-to-infection ratio) using the restrictive definition. Fig 2D shows the disease-to-infection ratio using the more open definition.