<prompt> Answer this question truthfullyWhat are the factors that increase the risk of getting infected with Haemophilus influenzae?  <response>: <reason> Unvaccinated infants and children aged less than 5 years who travel may be at risk for serious Hib infection, especially to a country which does not use Hib vaccine. Also, adults who have been splenectomized are at higher risk of acquiring the infection. 