Six more people in Oklahoma have died from the flu, including one person in Tulsa County.

One of the six died from the seasonal flu, said Larry Weatherford, spokesman for the Oklahoma State Department of Health.

"We don't typically track seasonal flu," Weatherford said. "Seasonal flu hits the elderly the hardest, which makes it harder to track because often there are complications associated with that."

According to the state Health Department, 33 people in Oklahoma have died since Sept. 1 from either the H1N1 strain — also called swine flu — or from the seasonal flu.

A Kay County man who died before the state began keeping track of swine-flu deaths is not included in the official tally, but brings the total for the state to 34.

Among those who died last week, three were between 25 and 49 years old and three were between 50 and 63 years old, including the person in Tulsa County. No children or people older than 65 died last week from any flu virus.

Oklahoma County had two more flu deaths, Comanche County had one and Custer and Kiowa counties each had a flu death for the first time since September.

The Tulsa City-County Health Department has set another free walk-in H1N1 vaccination clinic from 2 to 7 p.m. Tuesday at the Expo Exchange Center, 21st Street between Harvard and Yale avenues.

This week's two-day H1N1 vaccination clinic was the first that was open to all Tulsa County residents, and more than 8,000 were vaccinated, said Melanie Christian, spokeswoman for the Tulsa City-County Health Department.

Officials also have started to see a few people test positive for seasonal flu, but it's hard to track, Christian said. "It's not a reportable disease. If a doctor does test for it, they don't have to report it to the Health Department," she said.

Seasonal flu season lasts from late November through March and it peaks in late January and early February.

It's too early to tell whether the swine flu will have a similar peak. "One of the unusual facts with a pandemic is we see a flu virus outside its usual season," Weatherford said.

Tulsa H1N1 clinics

WHERE: Expo Exchange Center, 21st Street between Harvard and Yale avenues.

COST: Free

Other upcoming Tulsa County H1N1 clinics:

• 3 to 7 p.m. Dec. 3 at the Tulsa Community College West Campus, 7505 W. 41st St.
• 9 a.m. to noon Dec. 12 at Oral Roberts University, 7777 S. Lewis Ave.

H1N1 flu clinic for other counties can be found at tulsaworld.com/h1n1clinics