I want to learn more about the H2N2 pandemic in the United States.
user
Why are you interested in learning more about that?
assistant
With the covid pandemic going on I got interested in our past with pandemics. Can you tell me what year the H2N2 pandemic started and ended?
user
Are you asking for the dates of the US epidemic of the H2N2 virus?
assistant
I want to learn more about the H2N2 pandemic in the United States.
user
Why are you interested in learning more about that?
assistant
With the covid pandemic going on I got interested in our past with pandemics. Can you tell me what year the H2N2 pandemic started and ended?
user
The H2N2 pandemic started in 2009, and ended in 2010.  The symptoms it caused were worse than H1N1 and included congestive heart failure and an increased risk of bacterial pneumonia.
assistant
I want to learn more about the H2N2 pandemic in the United States.