The City-County Health District confirmed it is investigating the possibility of more human cases of West Nile virus. Health officials said they are waiting for lab results from Austin.

The health department would not expound on how many people could possibly be infected or even the ages, saying only that it wants to be certain it is West Nile virus so as not to start a panic.

Meantime for parents, there is no question mosquitoes carrying West Nile virus are a major concern.

Parent Richard de la Cruz plays catch at Album Park with his son Blue. He says it's not always fun and games with all of the mosquitoes around the park.

"That's the first thing we do. We spray ourselves and make sure we're covered," said de la Cruz, talking about the precautions he takes so he and his son don't get bitten.

With the area still in monsoon season, forecasters are predicting more rain, which health officials said will keep the mosquito population breeding.

In his office, Dr. Jagdish Patel said he's seen a lot of parents coming in because they are concerned that their children have mosquito bites.

Patel explained that the West Nile virus is most threatening to people with immune-compromised systems, like the very young or the elderly.

"For healthy kids, for healthy adults, that virus is not as common. They give you a little flu symptoms, and you're fine," Patel said.