''Haemophilus influenzae'' is a species of the ''[[Haemophilus species - Overview|Haemophilus]]'' genus. There are unencapsulated and encapsulated strains. Encapsulated strains can be classified by their capsular antigens. There are six types of encapsulated ''Haemophilus influenzae''; a, b, c, d, e, and f. | ''Haemophilus influenzae'' is a species of the ''[[Haemophilus species - Overview|Haemophilus]]'' genus. There are unencapsulated and encapsulated strains. Encapsulated strains can be classified by their capsular antigens. There are six types of encapsulated ''Haemophilus influenzae''; a, b, c, d, e, and f. |