As part of a national campaign, people are being reminded that there is now plenty of the vaccine to go around.
A third wave of the disease could hit and health experts say vaccination is the best way for people to protect themselves.
In Cook County, there is extra concern about getting minorities vaccinated.
"We are seeing more African Americans and Latinos who are being hospitalized from H1N1," said Stephen Martin, Jr., PhD., Cook County Department Public Health.
"We don't know whether there will be another wave of illness, or where or when one might be, and that is why prevention is so important. There are still lives to be saved," said Cristal Thomas, HHS.
The H1N1 vaccine is available through local health departments, doctors' offices and retail pharmacies. Out-of-pocket cost can run anywhere from $12 to $22.