Aedes aegypti mosquitoes can transmit the Zika virus, which has been linked to birth defects, to humans. Officials say there have been no cases of mosquito-to-human transmission in Texas.
Aedes aegypti mosquitoes can transmit the Zika virus, which has been linked to birth defects, to humans. Officials say there have been no cases of mosquito-to-human transmission in Texas. Erik F. Brandsborg / Flickr

Dallas confirmed its fourth case of the Zika virus for 2017, prompting concern about the illness which was reported in 22 people last year. (D Healthcare)

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Cassandra Pollock was a state politics reporter for the Tribune. She joined the Tribune full-time in June 2017 after a fellowship during the 85th Texas Legislature. Pollock spent her first two years at...