SAN ANTONIO — Governor Greg Abbott identified contact-tracing as a critical element in his plan to reopen Texas—and stop the spread of the novel coronavirus, which has killed nearly 700 across the state. When a person tests positive for the virus, tracers contact the patient and create a timeline of where that patient has been and with whom he/she has been in contact. “Time is of the essence. We need to identify these contacts as early as possible,” said Anita Kurian, assistant director of the Communicable Disease Division with San Antonio Metro Health. Kurian said the first objective is to...