Understanding the Complex Terminology of Influenza Viruses

Influenza Viruses: What’s In a Name?

Influenza viruses are notorious for their constant evolution and unpredictability. This means it is crucial to understand the terminology surrounding these viruses, specifically “antigenic drift” and “antigenic shift.” These phenomena explain why we need an annual flu vaccine.

Firstly, let me clarify that influenza viruses have two main types: hemagglutinin (H) and neuraminidase (N). For simplicity’s sake, I will refer to them as H and N.

Source: www.forbes.com