How Many Swine Flu Cases Are There?

The CDC and WHO have been monitoring the Swine Flu pandemic since April 2009. This post will assimilate that data.


The CDC estimates that the number of swine flu cases is significantly higher than the number of confirmed cases (UPDATE OCT 29: new estimate). In May 2009, the CDC estimated there were 100,000 cases of swine in the US; the number of confirmed cases was closer to 7,500. At the June ACIP meeting, the CDC estimated there were 1 million cases of swine flu in the US; the number of confirmed cases was closer to 28,000. UPDATE OCT 29: The CDC released a report that estimates that after May 12, the number of cases was actually 79 times higher than the number of confirmed cases. The graph below uses confirmed cases.
As of mid-October, 1 in 4,000 Americans have had confirmed cases (roughly 1 in 50 have probably had it). Americans have been hit hard compared to the rest of the world where roughly 1 in 17,500 humans have had confirmed cases (roughly 1 in 225 have probably had it).

Copyright © 2009 Peter Dolph