Dallas Health and Human Services identified West Nile virus in three Dallas County locations this week.

As of Thursday, mosquito pools tested in Irving's 75061 ZIP code, Richardson's 75080 ZIP code and Rowlett's 75088 ZIP code all produced positive results for the virus.

This comes after Tarrant County Public Health (TCPH) confirmed that a routinely collected mosquito sample tested positive for WNV on May 8, kicking off the WNV season in North Texas that typically runs from May through October.

Summer is an especially vulnerable time for the virus, that relies on heat-loving mosquitos as it's main carrier. Most people contract the virus after being bitten my an infected mosquito.

TCPH said in a statement that most infected people are symptomatic.

"About 1 in 5 [infected people] ma

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