WHO study suggests low incidence of Hib in india is due to natural immunity.
Gupta
Neeraj
N
Puliyel
Jacob
J
D018073:Haemophilus Vaccines; D006801:Humans; D007113:Immunity, Innate / Q000276:immunology*; D015994:Incidence; D007194:India / Q000453:epidemiology; D008583:Meningitis, Haemophilus / Q000453:epidemiology* / Q000276:immunology*; D014944:World Health Organization
D018073:Haemophilus Vaccines