The infected person visited a Panera Bread in Old Town, 400 W. Division St., on July 13 and a Jewel-Osco in Mount Prospect at 333 E. Euclid Ave. on July 14. People are urged to call a doctor if they are showing symptoms of measles, and were at the Panera between 5 and 8:30 p.m. on July 13 or at the Jewel-Osco between noon and 4 p.m. July 14.