FILE - This 1975 microscope file image made available by the the Centers for Disease Control and Prevention shows Chlamydia trachomatis bacteria magnified 200X. A state report finds the number of cases of three major sexually transmitted diseases in California reached a 30-year high in 2018. The Department of Public Health said Tuesday that more than 336,000 cases of chlamydia, gonorrhea, and syphilis were reported. (Dr. E. Arum, Dr. N. Jacobs/CDC via AP, File)
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