EVERETT, Wash. - A King County physician with a suspected case of swine flu has been identified as a pediatrician who contracts with The Everett Clinic, a spokesperson said.

The 37-year-old doctor became ill on Monday night, after seeing patients that day in the Everett Clinic's Pediatric Department at Mill Creek Towncenter. She saw 22 patients on Monday at the Mill Creek location, said Everett Clinic spokeswoman April Zepeda.

Dr. Yuan-Po Tu, medical director of The Everett Clinic, told a news conference Thursday that the pediatrician's husband and two children also became sick, but were doing well on antiviral treatment. Their two children younger than school age and are watched by a private nanny.

The doctor's name has not been released, but she lives in King County. Tu says came to work Monday with what she thought were just seasonal allergy symptoms. She saw patients throughout the day but developed a fever that night and went to the emergency room, where she tested positive for what is assumed to be swine flu.

The Everett Clinic has contacted most of the patients she saw on Monday. One individual has reported flu-like symptoms. That patient will be evaluated by clinic staff.

Yolanda Larios, 28, was one of those who went to the Mill Creek clinic Thursday after clinic officials confirmed that the physician had treated her 7-month old son the previous Thursday.

"I was crying when they told me he was treated by that doctor," said Larios, of Mill Creek, wearing a blue mask and waiting outside for her kids to be tested.

Larios said she didn't have symptoms, but both her baby and 8-year-old son had fevers. Her baby, whom she brought into the clinic last week because of an ear infection, is also having respiratory problems, she said.

The clinic says families with pregnant moms or who have children age 5 or younger who have any flu-like symptoms should contact the Everett Clinic for treatment immediately.

In addition, the Everett Clinic has conducted 83 flu tests today throughout our locations. One tested positive for influenza A.

The clinic is now requesting that patients call their doctor’s office before coming in and wear a mask upon arrival. If patients are experiencing mild flu-like symptoms they should stay home to minimize exposing others, Zepeda said.

"The health of those who may have been exposed is our primary concern," Zepeda said in a prepared statement. "Every measure is being taken to ensure they receive the treatment and information that may be needed."

The symptomatic doctor has not recently traveled to Mexico, nor is she aware of any people with whom she has been in contact who have.

The Everett Clinic has been conducting daily meetings to prepare for the arrival of swine flu in Washington state, Zepeda said.

Several safety measures have already been activated. A team of doctors and administrative leaders worked through the night to implement plans to safely treat patients who may have been exposed to the virus.