Haemophilus influenzae type B

Greetings! My name is H. influenzea.
But not just any H. influenzae.
I have a special polysaccharide "capsule", so I can be "typed" into a specific group.
Of all the groups A to G, I am the most important in terms of making you sick.

In kids who are under 18 onths old, I tend to cause meningitis and septicaemia.
I can be rapidly fatal and even cause problem if they survive.
In kid over 18 months old, I usually cause epiglottitis, sweling and blocking off their airways.
I like to give everyone else pharyngitis and laryngotracheobronchitis, which often becomes croup.