We watched as little Ella Grace Carayanas got her dose of the nasal spray. Her mother says she's glad her three-year-old daughter is now protected against H1N1.

"She started school this year and they've had a couple of outbreaks," said Heather Carayanas."

The vaccine is being given out at Texas Children's Pediatric Associates, not at Texas Children's Hospital. It is in such short supply that only patients most at risk are being inoculated, right now.

"The vaccine will be in limited supply. So, what we will have to do is prioritize patients based on age and risk factors for who will be receiving the vaccine in the initial stages," said Cheryl Bartolome, RN.

Every doctor's office is handling the vaccine in its way. Patients who got to one of the 44 Texas Children's Pediatric Associates locations around Houston will be getting an automated phone call telling them when it's there turn to make an appointment for the vaccine.

"They have to remember that there may not be enough vaccine around right now, but we intend to have plenty of supply as the season progresses," said Bartolome.

The nasal vaccine is a live virus so pregnant women are not allowed to be vaccinated. Neither are infants younger than six months old.