CDC estimates that between 34 million and 67 million cases of 2009 H1N1 occurred between April and November 14. The mid-level in this range is about 47 million people infected with 2009 H1N1.
CDC estimates that between about 154,000 and 303,000 2009 H1N1-related hospitalizations occurred between April and November 14. The mid-level in this range is about 213,000 H1N1-related hospitalizations.
CDC estimates that between about 7,070 and 13,930 2009 H1N1-related deaths occurred between April and November 14, 2009. The mid-level in this range is about 9,820 2009 H1N1-related deaths.
The CDC offers some comparisons with seasonal flu:
- Seasonal flu causes an average of 200,000 hospitalizations per year, with 60% of those occurring in those 65 and older. With H1N1, only about 10% of the hospitalizations have been for patients over 65.
- Seasonal flu causes about 36,000 deaths per year on average, with 90% of those occurring in people over 65.
The upside of H1N1 primarily affecting those under 65 is that there are fewer deaths compared with seasonal flu: taking the H1N1 mid-level estimates, there have been 10,000 deaths for 213,000 hospitalizations, compared with an average of 36,000 deaths and 200,000 hospitalizations for seasonal flu.