Haemophilus influenzae type b(Hib) is mainly transmitted through direct contact with nose or throat secretion of an infected person. It is a kind of bacteria that can cause serious invasive diseases, which usually affects young children. Haemophilus influenzae type b(Hib) does not cause influenza or flu. In contrary, it commonly presents as meningitis (infection of membranes covering the brain), often accompanied by germ entering the bloodstream. It may also affect other parts of the body, such as the lungs, epiglottis (upper part of the throat), etc. Meningitis can lead to symptoms such as...