MADISON, Wis. -- Dane County said it is basically out of the H1N1 flu vaccine, and health officials said that means they will have to decide which high-risk groups will get any new vaccine first.

With changes coming soon to how the H1N1 vaccine is distributed, many parents are left worrying and wondering about when their preschool child will be vaccinated -- or why they haven't been vaccinated already.

It's a question all too common at Associated Physicians in Madison. Staff said most of the of the calls coming in are from concerned parents wondering about the H1N1 vaccine.

"I think that there's a lot of anxiety and fear out there," said Dr. Elizabeth Neary, a pediatrician at Associated Physicians.

Katie Colbert, a mother of three, said she is searching for answers. She's one of many concerned parents who feel left in the dark.

"Nobody can tell me anything," Colbert said. "We go to the pediatricians, and there isn't an answer."

One of Colbert's three children is scheduled to be vaccinated at school in two weeks. Her other two aren't in school yet -- and a vaccination plan for them is unknown. She said she's most concerned about 4-year-old Brady.

"My 4-year-old has had pneumonia five times," Colbert said. "There's just a lot of fear right now."

Neary said she understands parents' concerns. Her clinic received its first H1N1 vaccination shipment on Wednesday -- but just for staff and very high-risk children. Now, the clinic is out of vaccine, and Neary is urging parents to have patience and not to worry.

"Our nurses are doing a fabulous job talking to people on the phone and calming down the anxiety," Neary said. "I'm hoping that we get a good amount next week -- so every week, we're going to get a new amount. So it's coming."

But Colbert said she questions how the vaccine is being distributed -- and why her high-risk son, among many others, is being left out. She said she worries that because the distribution process has been focusing on schools first, that her high-risk son might never get the vaccine.

"That scares me now," Colbert said. "Is my pediatrician not going to have it?"

Public Health Madison and Dane County and others said that likely by the beginning of next week they will have a new strategy on which high-risk groups in the community should get the first supplies of H1N1 vaccine when they come in.