Cameron County health officials say they want to wait until all of the test samples are in to disclose the test results on urine samples collected voluntarily by people in a southwest side Brownsville neighborhood.
A woman from that part of the city was diagnosed with Zika. She had not traveled anywhere or contracted the virus through sexual contact.
That revelation led to a massive effort with health workers pounding the pavement to inform residents about mosquito abatement and health risks.
So far, more than 200 people have volunteered their urine samples to be tested for Zika. When those results are complete, health officials will have a much clearer picture of how serious the health threat is so they can determine what happens next.
Friday, epidemiological teams went back to the neighborhood to collect blood samples from patients considered high risk, pregnant women and people showing any signs of symptoms of Zika.
No travel restrictions have been put in place so far in the Rio Grande Valley based on the single suspected case of local Zika transmission.