By October 2009 an estimated 20,000 people had been hospitalized with Swine flu with over 1,000 deaths.
https://www.reuters.com/article/us-flu-usa-obama/obama-declares-swine-flu-a-national-emergency-idUSTRE59N19E20091024
https://www.reuters.com/article/us-flu-usa-obama/obama-declares-swine-flu-a-national-emergency-idUSTRE59N19E20091024
H1N1, declared a public health emergency earlier in the year, has killed more than 1,000 people in the United States and put more than 20,000 in the hospital since it emerged earlier this year, the CDC said. But health officials are quick to note that the actual number of cases cannot be measured.