A box of patient records being shipped to the state Department of Public Health by Western Connecticut Health Network was sent back to the hospital opened, with some contents damaged.  The box was mailed via the U.S. Postal Service and broke open in June, and it was returned July 9th.  Nuvance Health says out of an abundance of caution in this privacy incident, they're sending a letter to patients who may have had their name, address, date of birth, and medical record data compromised.  Officials say there's no evidence the box left USPS custody until it was returned.  There's no evidence the information was misused.  Anyone believing they were affected by the incident, but doesn't receive a letter by August 30th is asked call (833) 762-0225, Monday through Friday, 9am - 6:30pm.