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This 1975 file microscope image made available by the the Centers for Disease Control and Prevention shows chlamydia trachomatis bacteria magnified 200 times. (Dr. E. Arum, Dr. N. Jacobs/CDC via AP, File)
Photo by: Dr. E. Arum
This 1975 file microscope image made available by the the Centers for Disease Control and Prevention shows chlamydia trachomatis bacteria magnified 200 times. (Dr. E. Arum, Dr. N. Jacobs/CDC via AP, File)

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