Fall means football, foliage -- and flu shots.

People have begun showing up at clinics again to get their flu vaccine but this year it's happening in a specific order.

The government has grouped the population into three tiers. People at the highest risk of developing flu complications are the only ones who are supposed to get a shot before October 24th. After that date, the rest of the population can get the vaccine.

Maxim Health Systems will provide shots at 24-thousand clinics and says it will turn away low-risk people who show up before October 24th. It says people shouldn't worry about a vaccine shortage this year.