Source?
The 2009 H1N1 pandemic originated in the United States before spreading around the world, according to the U.S. Centers for Disease Control and Prevention (CDC). A later study suggested it was first diagnosed in humans in Mexico. The CDC estimated that from April 12, 2009 to April 10, 2010, there were 60.8 million H1N1 cases, with 274,304 hospitalizations and 12,469 deaths in the U.S. alone.
https://www.biospace.com/article/2009-h1n1-pandemic-versus-the-2020-coronavirus-pandemic/