Fig. 2

Epidemiology of Hia disease in Minnesota. a, Invasive Hia disease by race in Minnesota, 2006–2017. An emergence of Hia disease is noted in American Indian children, particularly since 2013, peaking at ~ 4.8 cases/100,000 population in 2014. b, disease characteristics of invasive Hia disease compared to non-Hia cases in children under 5 years of age. Hia cases in Minnesota noted to have ~ 2-fold increased risk of presenting as meningitis compared to the non-Hia cases of invasive Haemophilus influenzae disease