June 20 (UPI) -- Insurer Aflac said Friday customer health data and Social Security numbers were hacked, but that it stopped the cyber intrusion within hours and the attack did not include ransomware. Aflac is a U.S.-based company best known for its supplemental policies that help cover expenses that major medical insurance doesn't. It serves some 50 million people worldwide, largely in the United State and Japan. Aflac said the impacted files include "claims information, health information,