This year's flu season is the worst Wisconsin has seen since 2009. That may be why flu shots are in higher demand.
"I don't know if just because of the flu this year, that more people are getting it, it's in higher demand," said Taya Staples, a pharmacist at Marshfield Clinic.
Staples said ordering the vaccine can be a guessing game.
"All of the flu vaccine is bought ahead of time. So, we kind of have to guess at how much we're going to use in a certain flu season. So, we predict from previous years," said Staples.
Pharmacists at Marshfield Clinic said they think their supply will be enough to serve their patients.
"At this time, our supply is somewhat limited, but we believe that we'll have enough to get through the flu season," said Staples.
Leaders at Marshfield Clinic said everyone over six months old should get a flu shot.
Dr. Edward Belongia was part of a team that studied the effectiveness of this year's vaccine. He said getting a flu shot lowers your chances of getting sick by 60 percent.
"Ninety percent vaccine would be ideal. We'd love to see that, and I think eventually, we're going to get there. There needs to be a lot of research to get us to that point, but in the meantime, who would want to turn down 60 percent protection?" said Dr. Belongia.
And Dr. Belongia said it's better to be safe than sorry.
"We hear about people who were vaccinated and got the flu, but we don't hear from the folks who are vaccinated and didn't get the flu, and there are a lot more of those people out there," said Dr. Belongia.