The WHO gave up tracking cases on July 23, 2009, 3 months after the epidemic started, when it hit several hundred thousand confirmed cases. At that point it just became a part of seasonal flu. It's circulating again this year: in recent weeks it's been the most common seasonal flu variant infecting people, and with 19M flu cases so far this year, there have almost certainly been more deaths from H1N1 than from nCoV.
http://www.cidrap.umn.edu/news-perspective/2011/08/study-put...
The CDC estimated 60M cases in the U.S. alone, about 20% of the population:
https://www.cdc.gov/flu/pandemic-resources/2009-h1n1-pandemi...
The WHO gave up tracking cases on July 23, 2009, 3 months after the epidemic started, when it hit several hundred thousand confirmed cases. At that point it just became a part of seasonal flu. It's circulating again this year: in recent weeks it's been the most common seasonal flu variant infecting people, and with 19M flu cases so far this year, there have almost certainly been more deaths from H1N1 than from nCoV.
https://en.wikipedia.org/wiki/2009_flu_pandemic_timeline#Jul...