Tarrant County Public Health has confirmed the first positive measles cases in Tarrant County. According to TCPH, the cases involve an adult and a child, both unvaccinated household members. The agency said the source of the infection had not been determined.

Health officials have confirmed two measles cases in Tarrant County, the first cases reported in the county this year. Tarrant County Public Health officials announced the cases late Friday evening. The two patients are “household members,” according to the announcement, and both are unvaccinated. One is a child and one is an adult.

Tarrant County confirmed its first positive cases of measles May 2. Two cases, in the same household, have been confirmed. It has not yet been determined where the patients contracted the disease, the public health agency said.