Setting the Stage for Flu’s Disappearing Act

Important points about U.S. flu surveillance, with examples from the 2009 H1N1 "pandemic"

Photo by Gwen King on Unsplash

In my first post on the disappearance of flu, I asserted:

1. Influenza was largely absent from surveillance reporting and detection for over a year due to Human Interference (HI), not Viral Interference (VI) or non-pharmaceutical interventions (NPIs)

2. Health agencies took actions and issued orders and guidance that account for th…