Distribution of major rotavirus strains in placebo groups for South Africa and Malawi. Figure obtained from Supplement to: Madhi SA, Cunliffe NA, Steele D, et al. Effect of human rotavirus vaccine on severe diarrhea in African infants. N Engl J Med 2010;362:289-98.
Steele et al. BMC Infectious Diseases 2012 12:213 doi:10.1186/1471-2334-12-213