Influenza+Subgroups

Influenza Subgroups

The Influenza virus presents in three categories. //Influenza// A, //Influenza// B and //Influenza// C. Although each type of //Influenza// virus has a similar structure and replication cycle, they vary greatly in rates of transmission, infectivity and danger to health.2]

 Influenza A

//Influenza// A is the most common Influenza subgroup and is originally found in aquatic bird hosts. The high rate of mutation of type A //Influenza// has occasionally caused cross-species transmission and has been responsible for the highest number of human casualties, including the Spanish Flu of 1918.2,7]

Influenza B

//Influenza// B is a //Human// exclusive, Influenza subgroup. //Influenza// B is very uncommon, however, and has a very slow rate of mutation, allowing most infected individuals to form early resistances to this strain very early in childhood.7]

Influenza C

//Influenza// C affects //Canine//, //Human// and //Swine// species and can cause quite severe symptoms in some cases. Type C //Influenza// is the least common of the three subgroups and usually presents as only mild symptoms in children. 2]