Tom Atchison just got off a flight from Oakland.

He was surprised to hear that a Hawaiian Air crew member recently tested positive for Hep A, but he wasn't overly concerned.

"Every time you fly you put yourself in a sardine can with a couple hundred people, there's always risks when you fly. I usually get a cold or flu. Hope no Hep A, right?" Atchison said,

Health officials stress no infections have been linked to the exposure, but as a precaution, Hawaiian is working with the state to minimize the risk.

The crew member served food and drinks to passengers and that's prompted an alert to travelers who may have been on the same flight.

"It’s an important reminder just as we are at risk for diseases to be introduced here, it can also go elsewhere and it could be anyone who transport that disease to and from our state and so we all have to think about what we can do as individuals and as a community to protect ourselves," said Dr. Sarah Park of the State Health Department’s Infectious Disease Branch.

The flight attendant was on the job between July 1- July 26 for a total of 33 flights. Most were to the neighbor islands, some to Oakland and Las Vegas and one to Sydney Australia.

Anyone who traveled on the affected flights are being advised to check with their doctor.

Hawaiian is offering to cover costs for screenings and vaccinations for passengers on those flights and has a reimbursement program in place.

But officials stress the risk of transmission is very low.

Another restaurant whose employee tested positive is Chili's in Kapolei.

The dates of concern are during a two-week period between July 10 and 27th.

In a statement the company said, "While there have been no infections linked to chili's we will continue to maintain our strict standard of cleanliness to ensure we are operating a clean and safe restaurant for the well-being of our guests and team members.

"If you are a food handler in any way, whether it’s on a flight, or a potluck, or preparing food for your family, you need to take the precautions that you don't pass on an infection that you have," said Park.

Good hygiene and vaccinations she says are the best safeguards,

The workload for Park's staff has now gotten heavier as they try to contain the outbreak and identify the source.

"I think we are a lot closer now than at the start of this. That I can say that

we have some good leads at this point and we have made some progress"

said Park.

But what if those leads come up empty?

"We may never find the source, but that doesn't mean we quit," Park said.