Types of Flu
Influenza that can infect humans is broken into 3 types: A, B, and C. Type A is then broken down into subtype, depending on the combination of Hemagglutinin (HA) and Neuraminidase (NA) proteins on its surface. Some of these subtypes are then further broken down into strains. Sinobiological has a list of 98 strains of Type A and Type B Flu. (http://bit.ly/2Hly7zl, http://bit.ly/2HlhSCp)